**Title:** Number Carousel

**Description:**
First grade students will be able to use various strategies and their understanding of addition to make 10 and 17 in multiple ways. Lesson will help students use 2 or 3 different numbers to make 10 or use 2 or 3 different numbers to create numbers up to 20.
This is a College- and Career-Ready Standards showcase lesson plan.
**Standard(s): **

[MA2015] (1) 2: Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem. [1-OA2]

**Subject:**Mathematics (1)

**Title:**Number Carousel

**Description:**First grade students will be able to use various strategies and their understanding of addition to make 10 and 17 in multiple ways. Lesson will help students use 2 or 3 different numbers to make 10 or use 2 or 3 different numbers to create numbers up to 20. This is a College- and Career-Ready Standards showcase lesson plan.

**Title:** Camp Add 'Em Up

**Description:**
When you go to camp, you expect to have a great time and learn a lot. The Camp Add 'Em Up lesson series is designed to guide a first grade student through development of addition and subtraction strategies through patterning. This lesson has the unique element of offering the learning pages in Spanish for students who are bilingual or for the teacher who would like to integrate Spanish language elements into lessons. Creative learners and technical learners have options included within each lesson as extension activities.
**Standard(s): **

[MA2015] (1) 3: Apply properties of operations as strategies to add and subtract. (Students need not use formal terms for these properties.) [1-OA3]

**Subject:**Mathematics (1)

**Title:**Camp Add 'Em Up

**Description:**When you go to camp, you expect to have a great time and learn a lot. The Camp Add 'Em Up lesson series is designed to guide a first grade student through development of addition and subtraction strategies through patterning. This lesson has the unique element of offering the learning pages in Spanish for students who are bilingual or for the teacher who would like to integrate Spanish language elements into lessons. Creative learners and technical learners have options included within each lesson as extension activities.

**Title:** Cookie Jar Subtraction

**Description:**
In this language development subtraction lesson English Language Learners will learn and practice using vocabulary and sentence structures for subtraction. The lesson incorporates technology, hands-on manipulatives, and multiple opportunities for interaction to engage students in the math content. The format follows the Sheltered English Instructional Protocol (SIOP).
**Standard(s): **

[MA2015] (1) 18: Organize, represent, and interpret data with up to three categories; ask and answer questions about the total number of data points, how many in each category, and how many more or less are in one category than in another. [1-MD4]

**Subject:**Mathematics (1)

**Title:**Cookie Jar Subtraction

**Description:**In this language development subtraction lesson English Language Learners will learn and practice using vocabulary and sentence structures for subtraction. The lesson incorporates technology, hands-on manipulatives, and multiple opportunities for interaction to engage students in the math content. The format follows the Sheltered English Instructional Protocol (SIOP).

**Title:** You Can Add!

**Description:**
Students will learn ways to add using the associative property of addition. Students will view a PowerPoint presentation to introduce associative property of addition.
**Standard(s): **

[MA2015] (1) 7: Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. [1-OA7]

**Subject:**Mathematics (1), or Technology Education (K - 2)

**Title:**You Can Add!

**Description:**Students will learn ways to add using the associative property of addition. Students will view a PowerPoint presentation to introduce associative property of addition.

**Title:** How Many Times Did You Add That?

**Description:**
After watching the video clip of the Hershey's plant, students will use grid paper to investigate multiplication as repeated addition.
This lesson plan was created by exemplary Alabama Math Teachers through the AMSTI project.
**Standard(s): **

[SS2010] LWT2 (2) 7: Explain production and distribution processes.

**Subject:**Mathematics (1 - 4), or Social Studies (2)

**Title:**How Many Times Did You Add That?

**Description:**After watching the video clip of the Hershey's plant, students will use grid paper to investigate multiplication as repeated addition. This lesson plan was created by exemplary Alabama Math Teachers through the AMSTI project.

**Title:** Multiplication Facts, Facts, Facts and Some Reese's Pieces for Snack!!

**Description:**
This lesson teaches the basic math multiplication facts in a fun way so that students will want to remember them. Knowledge of all multiplication facts will help with learning subsequent skills in longer multiplication, division, fractions, etc.
**Standard(s): **

[MA2015] (3) 5: Apply properties of operations as strategies to multiply and divide. (Students need not use formal terms for these properties.) [3-OA5]

**Subject:**Mathematics (1 - 3), or Technology Education (3 - 5)

**Title:**Multiplication Facts, Facts, Facts and Some Reese's Pieces for Snack!!

**Description:**This lesson teaches the basic math multiplication facts in a fun way so that students will want to remember them. Knowledge of all multiplication facts will help with learning subsequent skills in longer multiplication, division, fractions, etc.

**Title:** Toy Store Money

**Description:**
During this lesson students will have the opportunity to use real coins to purchase items in a class department store. Students will work to determine which coins they need to purchase an object. They will also practice counting skills on the Internet before the big shopping day.
**Standard(s): **

[MA2015] (2) 7: Read and write numbers to 1000 using base-ten numerals, number names, and expanded form. [2-NBT3]

**Subject:**Mathematics (K - 2), or Technology Education (K - 2)

**Title:**Toy Store Money

**Description:**During this lesson students will have the opportunity to use real coins to purchase items in a class department store. Students will work to determine which coins they need to purchase an object. They will also practice counting skills on the Internet before the big shopping day.

**Title:** Hundred Blocks Board

**Description:**
In this lesson students will practice adding, subtracting, and multiplying without regrouping using a hundred blocks board. Students will be given opportunities to identify and discuss different patterns that they discover and relate number patterns to visual patterns.
**Standard(s): **

[MA2015] (3) 9: Identify arithmetic patterns (including patterns in the addition table or multiplication table), and explain them using properties of operations. [3-OA9]

**Subject:**Mathematics (K - 3), or Technology Education (K - 2)

**Title:**Hundred Blocks Board

**Description:**In this lesson students will practice adding, subtracting, and multiplying without regrouping using a hundred blocks board. Students will be given opportunities to identify and discuss different patterns that they discover and relate number patterns to visual patterns.

**Title:** Who's in the Fact Family?

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students explore the relation of addition to subtraction. Students use problem-solving skills to find fact families, including those in which one addend is zero or in which the addends are alike.
**Standard(s): **

[MA2015] (1) 8: Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. [1-OA8]

**Subject:**Mathematics

**Title:**Who's in the Fact Family?

**Description:**In this lesson, one of a multi-part unit from Illuminations, students explore the relation of addition to subtraction. Students use problem-solving skills to find fact families, including those in which one addend is zero or in which the addends are alike.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Zero Our Hero

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students explore sets of zero items and practice writing the numbers 0 through 5. Students count back from five, identify sets of up to five items, and record 0 on a chart. They also construct sets of up to five items.
**Standard(s): **

[MA2015] (0) 3: Write numbers from 0 to 20. Represent a number of objects with a written numeral 0-20 (with 0 representing a count of no objects). [K-CC3]

**Subject:**Mathematics

**Title:**Zero Our Hero

**Description:**In this lesson, one of a multi-part unit from Illuminations, students explore sets of zero items and practice writing the numbers 0 through 5. Students count back from five, identify sets of up to five items, and record 0 on a chart. They also construct sets of up to five items.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Fact Families

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students use books and connecting cubes to explore the relationship of addition to subtraction. Students search for related addition and subtraction facts for a given number using a virtual or actual calculator to find differences. They also investigate fact families when one addend is 0 as well as when the addends are the same. Several pieces of literature appropriate for use with this lesson are suggested.
**Standard(s): **

[MA2015] (1) 8: Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. [1-OA8]

**Subject:**Language Arts,Mathematics

**Title:**Fact Families

**Description:**In this lesson, one of a multi-part unit from Illuminations, students use books and connecting cubes to explore the relationship of addition to subtraction. Students search for related addition and subtraction facts for a given number using a virtual or actual calculator to find differences. They also investigate fact families when one addend is 0 as well as when the addends are the same. Several pieces of literature appropriate for use with this lesson are suggested.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Where Will I Land?

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students find differences using the number line, a continuous model for subtraction. Students are encouraged to predict differences and to compose puzzles involving subtraction. This lesson provides rich experiences in reasoning and problem solving.
**Standard(s): **

[MA2015] (2) 13: Explain why addition and subtraction strategies work, using place value and the properties of operations. (Explanations may be supported by drawings or objects.) [2-NBT9]

**Subject:**Mathematics

**Title:**Where Will I Land?

**Description:**In this lesson, one of a multi-part unit from Illuminations, students find differences using the number line, a continuous model for subtraction. Students are encouraged to predict differences and to compose puzzles involving subtraction. This lesson provides rich experiences in reasoning and problem solving.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Comparing Connecting Cubes

**Description:**
In this seven-lesson unit from Illuminations, students use connecting cubes to explore the five models of subtraction (counting, sets, number line, balanced equations, and inverse of addition). The lessons focus on the comparative mode of subtraction. Students explore the relationship between addition and subtraction, write story problems in which comparison is required, and practice the subtraction facts. Several pieces of literature appropriate for use with this lesson are suggested.
**Standard(s): **

[MA2015] (2) 1: Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem. (See Appendix A, Table 1.) [2-OA1]

**Subject:**Mathematics

**Title:**Comparing Connecting Cubes

**Description:**In this seven-lesson unit from Illuminations, students use connecting cubes to explore the five models of subtraction (counting, sets, number line, balanced equations, and inverse of addition). The lessons focus on the comparative mode of subtraction. Students explore the relationship between addition and subtraction, write story problems in which comparison is required, and practice the subtraction facts. Several pieces of literature appropriate for use with this lesson are suggested.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Lost Buttons

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students investigate subtraction more directly, beginning with the easier take away mode. They model take away subtraction with buttons and write subtraction sentences. They also work with the additive identity (0) as an addend and as a difference and find missing addends.
**Standard(s): **

[MA2015] (2) 18: Use addition and subtraction within 100 to solve word problems involving lengths that are given in the same units, e.g., by using drawings (such as drawings of rulers) and equations with a symbol for the unknown number to represent the problem. [2-MD5]

**Subject:**Language Arts,Mathematics

**Title:**Lost Buttons

**Description:**In this lesson, one of a multi-part unit from Illuminations, students investigate subtraction more directly, beginning with the easier take away mode. They model take away subtraction with buttons and write subtraction sentences. They also work with the additive identity (0) as an addend and as a difference and find missing addends.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Sum Search

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students practice addition facts in a concentration-game format using dominoes. Then, they generate sums to given numbers using a calculator and record them on a hundred board and look for patterns. Later, they record their current level of addition-fact mastery on an addition table.
**Standard(s): **

[MA2015] (1) 5: Relate counting to addition and subtraction (e.g., by counting on 2 to add 2). [1-OA5]

**Subject:**Mathematics

**Title:**Sum Search

**Description:**In this lesson, one of a multi-part unit from Illuminations, students practice addition facts in a concentration-game format using dominoes. Then, they generate sums to given numbers using a calculator and record them on a hundred board and look for patterns. Later, they record their current level of addition-fact mastery on an addition table.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** What Balances?

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students explore subtraction using a pan balance. They use subtraction facts to generate related addition facts and explore at the concrete level the idea of subtraction as the inverse of addition.
**Standard(s): **

[MA2015] (1) 5: Relate counting to addition and subtraction (e.g., by counting on 2 to add 2). [1-OA5]

**Subject:**Mathematics

**Title:**What Balances?

**Description:**In this lesson, one of a multi-part unit from Illuminations, students explore subtraction using a pan balance. They use subtraction facts to generate related addition facts and explore at the concrete level the idea of subtraction as the inverse of addition.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Take Away

**Description:**
This lesson, from Illuminations, helps introduce elementary students to subtraction. The objective is to create a link between students experiences and mathematics. By the end of the lesson, it is expected that students should have a deep understanding of subtraction and how it relates to their world.
**Standard(s): **

[MA2015] (1) 1: Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem. (See Appendix A, Table 1.) [1-OA1]

**Subject:**Mathematics

**Title:**Take Away

**Description:**This lesson, from Illuminations, helps introduce elementary students to subtraction. The objective is to create a link between students experiences and mathematics. By the end of the lesson, it is expected that students should have a deep understanding of subtraction and how it relates to their world.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Finding the Balance

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students explore another model of subtraction, the balance. Students also explore recording the modeled subtraction facts and the related addition facts in equation form.
**Standard(s): **

[MA2015] (1) 7: Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. [1-OA7]

**Subject:**Mathematics

**Title:**Finding the Balance

**Description:**In this lesson, one of a multi-part unit from Illuminations, students explore another model of subtraction, the balance. Students also explore recording the modeled subtraction facts and the related addition facts in equation form.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** How Many More Fish? Looking Back and Moving Forward

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students use the mathematical knowledge and skills developed in the previous lessons as they play games involving comparative subtraction.
**Standard(s): **

[MA2015] (2) 21: Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies, using $ and ¢ symbols appropriately. [2-MD8]

**Subject:**Mathematics

**Title:**How Many More Fish? Looking Back and Moving Forward

**Description:**In this lesson, one of a multi-part unit from Illuminations, students use the mathematical knowledge and skills developed in the previous lessons as they play games involving comparative subtraction.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Shirts Full of Buttons

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students explore subtraction in the comparative mode by answering questions such as How many more? and How many less? as they match sets of buttons. They also make and discuss bar graphs based on the number of buttons they are wearing.
**Standard(s): **

[MA2015] (2) 23: Draw a picture graph and a bar graph (with single-unit scale) to represent a data set with up to four categories. Solve simple put-together, take-apart, and compare problems using information presented in a bar graph. (See Appendix A, Table 1.) [2-MD10]

**Subject:**Mathematics

**Title:**Shirts Full of Buttons

**Description:**In this lesson, one of a multi-part unit from Illuminations, students explore subtraction in the comparative mode by answering questions such as How many more? and How many less? as they match sets of buttons. They also make and discuss bar graphs based on the number of buttons they are wearing.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Counting Back and Counting On

**Description:**
This lesson, one of a multi-part unit from Illuminations, focuses on the counting model for subtraction. Students model numbers as a counting book is read. They then make a chain of links and write in vertical and horizontal format the differences suggested by adding and subtracting one link at a time from their chains. Finally, they draw a chain showing one link being taken away and write in two formats the difference it represents.
**Standard(s): **

[MA2015] (2) 20: Tell and write time from analog and digital clocks to the nearest five minutes, using a.m. and p.m. [2-MD7]

**Subject:**Mathematics

**Title:**Counting Back and Counting On

**Description:**This lesson, one of a multi-part unit from Illuminations, focuses on the counting model for subtraction. Students model numbers as a counting book is read. They then make a chain of links and write in vertical and horizontal format the differences suggested by adding and subtracting one link at a time from their chains. Finally, they draw a chain showing one link being taken away and write in two formats the difference it represents.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** How Many More?

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students write subtraction problems, model them with sets of fish-shaped crackers, and communicate their findings in words and pictures. They record differences in words and symbols. The additive identity is reviewed in the context of comparing equal sets. Several pieces of literature appropriate for use with this lesson are suggested.
**Standard(s): **

[MA2015] (1) 8: Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. [1-OA8]

**Subject:**Mathematics

**Title:**How Many More?

**Description:**In this lesson, one of a multi-part unit from Illuminations, students write subtraction problems, model them with sets of fish-shaped crackers, and communicate their findings in words and pictures. They record differences in words and symbols. The additive identity is reviewed in the context of comparing equal sets. Several pieces of literature appropriate for use with this lesson are suggested.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Investigating Greater Than, Less Than, and Equal To

**Description:**
Students are introduced to the concepts of greater than, less than, and equal to by observing quantities and making comparisons. Using varied instructional materials such as play dough, buttons, beans, and cotton balls, students will create amounts to compare with the use of a double-sided fish. Depending on its position, the fish cut-out (with its mouth open) can represent either greater than or less than. For equivalent amounts, a clam cut-out can represent equal to.
**Standard(s): **

[MA2015] (1) 2: Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem. [1-OA2]

**Subject:**Mathematics

**Title:**Investigating Greater Than, Less Than, and Equal To

**Description:**Students are introduced to the concepts of greater than, less than, and equal to by observing quantities and making comparisons. Using varied instructional materials such as play dough, buttons, beans, and cotton balls, students will create amounts to compare with the use of a double-sided fish. Depending on its position, the fish cut-out (with its mouth open) can represent either greater than or less than. For equivalent amounts, a clam cut-out can represent equal to.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Addend Pairs to 12

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students explore pairs of numbers that add to 12 or less by playing a game. They then add to their personal addition chart and prepare a new chart that allows access to the facts they do not know.
**Standard(s): **

[MA2015] (1) 6: Add and subtract within 20, demonstrating fluency for addition and subtraction within 10.
Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13). [1-OA6]

**Subject:**Mathematics

**Title:**Addend Pairs to 12

**Description:**In this lesson, one of a multi-part unit from Illuminations, students explore pairs of numbers that add to 12 or less by playing a game. They then add to their personal addition chart and prepare a new chart that allows access to the facts they do not know.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Combining Foods

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students explore addition and comparison subtraction by modeling and recording related addition and subtraction facts for a given number. The students also investigate the commutative property and model fact families, including those in which one addend is zero and those in which the addends are alike.
**Standard(s): **

[MA2015] (1) 2: Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem. [1-OA2]

**Subject:**Health,Mathematics

**Title:**Combining Foods

**Description:**In this lesson, one of a multi-part unit from Illuminations, students explore addition and comparison subtraction by modeling and recording related addition and subtraction facts for a given number. The students also investigate the commutative property and model fact families, including those in which one addend is zero and those in which the addends are alike.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Hopping Backward to Solve Problems

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students determine differences using the number line to compare lengths. At the end of the lesson, the students use reasoning and problem-solving to predict differences and answer puzzles involving subtraction.
**Standard(s): **

[MA2015] (1) 1: Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem. (See Appendix A, Table 1.) [1-OA1]

**Subject:**Mathematics

**Title:**Hopping Backward to Solve Problems

**Description:**In this lesson, one of a multi-part unit from Illuminations, students determine differences using the number line to compare lengths. At the end of the lesson, the students use reasoning and problem-solving to predict differences and answer puzzles involving subtraction.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Comparing Sets

**Description:**
In this lesson, one of a multi-part unit from Illuminations, a children s book sets the stage for encouraging students to review counting back. Students write subtraction problems and model them with cubes. They then compare sets and record differences in the form of a table. The additive identity is reviewed in the context of comparing equal sets. Several pieces of literature appropriate for use with this lesson are suggested.
**Standard(s): **

[MA2015] (2) 13: Explain why addition and subtraction strategies work, using place value and the properties of operations. (Explanations may be supported by drawings or objects.) [2-NBT9]

**Subject:**Language Arts,Mathematics

**Title:**Comparing Sets

**Description:**In this lesson, one of a multi-part unit from Illuminations, a children s book sets the stage for encouraging students to review counting back. Students write subtraction problems and model them with cubes. They then compare sets and record differences in the form of a table. The additive identity is reviewed in the context of comparing equal sets. Several pieces of literature appropriate for use with this lesson are suggested.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Do It With Dominoes

**Description:**
In this six-lesson unit from Illuminations, students explore the four models of addition (counting, sets, number line, and balanced equations) using dominoes. Students also learn about the order property, the relation between addition and subtraction, and the result of adding 0. Students engage in a variety of activities, including writing story problems in which the operation of addition is required, beginning to memorize addition facts, investigating properties of addition, and representing addition in pictures.
**Standard(s): **

[MA2015] (2) 13: Explain why addition and subtraction strategies work, using place value and the properties of operations. (Explanations may be supported by drawings or objects.) [2-NBT9]

**Subject:**Mathematics

**Title:**Do It With Dominoes

**Description:**In this six-lesson unit from Illuminations, students explore the four models of addition (counting, sets, number line, and balanced equations) using dominoes. Students also learn about the order property, the relation between addition and subtraction, and the result of adding 0. Students engage in a variety of activities, including writing story problems in which the operation of addition is required, beginning to memorize addition facts, investigating properties of addition, and representing addition in pictures.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Links Away: Looking Back and Moving Forward

**Description:**
This lesson, one of a multi-part unit from Illuminations, reviews the work of the previous lessons and suggests a framework for summative assessment. Students review the models for subtraction, use the properties of subtraction, and memorize subtraction facts. During this lesson, students use the mathematical knowledge and skills developed in the previous lessons to demonstrate understanding and ability to apply that knowledge to playing a new game.
**Standard(s): **

[MA2015] (2) 2: Fluently add and subtract within 20 using mental strategies. (See standard 6, Grade 1, for a list of mental strategies.) By end of Grade 2, know from memory all sums of two one-digit numbers. [2-OA2]

**Subject:**Mathematics

**Title:**Links Away: Looking Back and Moving Forward

**Description:**This lesson, one of a multi-part unit from Illuminations, reviews the work of the previous lessons and suggests a framework for summative assessment. Students review the models for subtraction, use the properties of subtraction, and memorize subtraction facts. During this lesson, students use the mathematical knowledge and skills developed in the previous lessons to demonstrate understanding and ability to apply that knowledge to playing a new game.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Taking Away Sets

**Description:**
This lesson, one of a multi-part unit from Illuminations, encourages students to explore another model for subtraction, the familiar set model. Reading one of the many books that feature subtraction sets the stage for this lesson in which the students write story problems, find differences using sets, and present results in a table. In the discussion of the table, they focus on the effects of subtracting all and subtracting 0.
**Standard(s): **

[MA2015] (1) 5: Relate counting to addition and subtraction (e.g., by counting on 2 to add 2). [1-OA5]

**Subject:**Mathematics

**Title:**Taking Away Sets

**Description:**This lesson, one of a multi-part unit from Illuminations, encourages students to explore another model for subtraction, the familiar set model. Reading one of the many books that feature subtraction sets the stage for this lesson in which the students write story problems, find differences using sets, and present results in a table. In the discussion of the table, they focus on the effects of subtracting all and subtracting 0.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Block Pounds

**Description:**
In this lesson, from Illuminations, students explore the use of variables as unknowns as they solve for the weights of objects using information presented in pictures. They also model situations that involve the addition and subtraction of whole numbers, using objects, pictures, and symbols.
**Standard(s): **

[MA2015] (2) 13: Explain why addition and subtraction strategies work, using place value and the properties of operations. (Explanations may be supported by drawings or objects.) [2-NBT9]

**Subject:**Mathematics

**Title:**Block Pounds

**Description:**In this lesson, from Illuminations, students explore the use of variables as unknowns as they solve for the weights of objects using information presented in pictures. They also model situations that involve the addition and subtraction of whole numbers, using objects, pictures, and symbols.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Building Sets of 13 and 14

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students explore sets of 13 and 14. They construct and identify sets of size 13 and size 14. They then compare sets to sets of size 13 and size 14, record the number in the sets, and decompose a set of 13 and a set of 14 in several ways.
**Standard(s): **

[MA2015] (2) 13: Explain why addition and subtraction strategies work, using place value and the properties of operations. (Explanations may be supported by drawings or objects.) [2-NBT9]

**Subject:**Mathematics

**Title:**Building Sets of 13 and 14

**Description:**In this lesson, one of a multi-part unit from Illuminations, students explore sets of 13 and 14. They construct and identify sets of size 13 and size 14. They then compare sets to sets of size 13 and size 14, record the number in the sets, and decompose a set of 13 and a set of 14 in several ways.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Finding Sums to Six

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students discover the role of the additive identity and explore sums to six. They continue to fill in their personal addition chart.
**Standard(s): **

[MA2015] (1) 6: Add and subtract within 20, demonstrating fluency for addition and subtraction within 10.
Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13). [1-OA6]

**Subject:**Mathematics

**Title:**Finding Sums to Six

**Description:**In this lesson, one of a multi-part unit from Illuminations, students discover the role of the additive identity and explore sums to six. They continue to fill in their personal addition chart.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Counting to Find Sums

**Description:**
This lesson, one of a multi-part unit from Illuminations, focuses on the counting model for addition and begins with reading a counting book. Students model the numbers with counters as the book is read. Then they count the spots on each side of a domino and write in vertical and horizontal format the sums suggested by dominoes. Finally, the students illustrate a domino and record a sum it represents for their portfolio. Several pieces of literature appropriate for use with this lesson are suggested.
**Standard(s): **

[MA2015] (1) 6: Add and subtract within 20, demonstrating fluency for addition and subtraction within 10.
Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13). [1-OA6]

**Subject:**Mathematics

**Title:**Counting to Find Sums

**Description:**This lesson, one of a multi-part unit from Illuminations, focuses on the counting model for addition and begins with reading a counting book. Students model the numbers with counters as the book is read. Then they count the spots on each side of a domino and write in vertical and horizontal format the sums suggested by dominoes. Finally, the students illustrate a domino and record a sum it represents for their portfolio. Several pieces of literature appropriate for use with this lesson are suggested.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Let's Learn Those Facts: Looking Back and Moving Forward

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students display their knowledge of properties of objects for sorting and creating patterns. They also demonstrate an understanding of commutativity and model addition and subtraction of whole numbers using different representations.
**Standard(s): **

[MA2015] (2) 9: Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction. [2-NBT5]

**Subject:**Mathematics

**Title:**Let's Learn Those Facts: Looking Back and Moving Forward

**Description:**In this lesson, one of a multi-part unit from Illuminations, students display their knowledge of properties of objects for sorting and creating patterns. They also demonstrate an understanding of commutativity and model addition and subtraction of whole numbers using different representations.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** Fact Family Fun

**Description:**
In this lesson, one of a multi-part unit from Illuminations, the relation of addition to subtraction is explored with fish-shaped crackers. The students search for related addition and subtraction facts for a given number and investigate fact families when one addend or the difference is 0.
**Standard(s): **

[MA2015] (2) 2: Fluently add and subtract within 20 using mental strategies. (See standard 6, Grade 1, for a list of mental strategies.) By end of Grade 2, know from memory all sums of two one-digit numbers. [2-OA2]

**Subject:**Mathematics

**Title:**Fact Family Fun

**Description:**In this lesson, one of a multi-part unit from Illuminations, the relation of addition to subtraction is explored with fish-shaped crackers. The students search for related addition and subtraction facts for a given number and investigate fact families when one addend or the difference is 0.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2

**Title:** 3.2.1 BEE done

**Digital Tool:**
abcya.com **Web Address URL:**
http://www.abcya.com/subtraction_game.htm **Standard(s): **

[MA2015] (1) 1: Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem. (See Appendix A, Table 1.) [1-OA1]**Digital Tool Description:** ABCya.com is a free, educational site equipped with activities and computer games for elementary students to learn on the web. All of the computer activities were created and/or approved by certified school teachers. All of the educational games are free and are also modeled from primary grade lessons and enhanced to provide an interactive way for students to learn.

**Title:**3.2.1 BEE done

**Digital Tool:**abcya.com

**Digital Tool Description:**ABCya.com is a free, educational site equipped with activities and computer games for elementary students to learn on the web. All of the computer activities were created and/or approved by certified school teachers. All of the educational games are free and are also modeled from primary grade lessons and enhanced to provide an interactive way for students to learn.

**Title:** Let's Make Ten

**Overview:**
In this activity, students practice determining different ways to make 10. They work together as partners and roll dice to determine the numbers they work with. They have to evaluate their numbers rolled to find a way to make a total of 10. They color in their bars to represent the numbers they rolled. A number sentence is composed and then they move on to the next roll. Once the activity is complete, a whole group discussion takes place and all the combinations that the students found are listed on the board. **Standard(s): **

[MA2015] (1) 6: Add and subtract within 20, demonstrating fluency for addition and subtraction within 10.
Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13). [1-OA6]

**Overview:**

In this activity, students practice determining different ways to make 10. They work together as partners and roll dice to determine the numbers they work with. They have to evaluate their numbers rolled to find a way to make a total of 10. They color in their bars to represent the numbers they rolled. A number sentence is composed and then they move on to the next roll. Once the activity is complete, a whole group discussion takes place and all the combinations that the students found are listed on the board.

**Title:** Calendar Math

**Overview:**
In this podcast our class will demonstrate how we use calendar math each day. We discussed the days of the week. We graphed the daily, monthly and yearly weather. We used the 100's chart to practice skip counting and even and odd numbers. We used straws to count the days of school, grouping ones, tens and one hundreds. **Standard(s): **

[MA2015] (1) 17: Tell and write time in hours and half-hours using analog and digital clocks. [1-MD3]

**Overview:**

In this podcast our class will demonstrate how we use calendar math each day. We discussed the days of the week. We graphed the daily, monthly and yearly weather. We used the 100's chart to practice skip counting and even and odd numbers. We used straws to count the days of school, grouping ones, tens and one hundreds.

**Title:** Electronic Abacus

**Description:**
This student interactive, from Illuminations, explores the use of an abacus model for representing numbers and for performing addition. Students can work through several different activities, all of which explore addition.
**Standard(s): **

[MA2015] (3) 11: Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction. [3-NBT2]

**Subject:**Mathematics

**Title:**Electronic Abacus

**Description:**This student interactive, from Illuminations, explores the use of an abacus model for representing numbers and for performing addition. Students can work through several different activities, all of which explore addition.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,PreK,1,2,3,4,5