**Title:** Where Oh Where Has My Addend Gone?

**Description:**
Students will use number bonds and counters as a strategy for finding the missing addend. Students will become aware of the relationship between addition and subtraction. They will also use counting as it is related to addition and subtraction.
This is a College- and Career-Ready Standards showcase lesson plan.
**Standard(s): **

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

**Subject:**Mathematics (1)

**Title:**Where Oh Where Has My Addend Gone?

**Description:**Students will use number bonds and counters as a strategy for finding the missing addend. Students will become aware of the relationship between addition and subtraction. They will also use counting as it is related to addition and subtraction. This is a College- and Career-Ready Standards showcase lesson plan.

**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:** 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:** Calculating Patterns

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students use an Internet-based calculator that is linked with an interactive Hundred Chart to create, extend, and record numerical patterns in different ways. By connecting the two representations, students observe the numerical patterns as they are created.
**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:**Calculating Patterns

**Description:**In this lesson, one of a multi-part unit from Illuminations, students use an Internet-based calculator that is linked with an interactive Hundred Chart to create, extend, and record numerical patterns in different ways. By connecting the two representations, students observe the numerical patterns as they are created.

**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:** 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:** Finding Fact Families

**Description:**
In this lesson, one of a multi-part unit from Illuminations, the relationship of subtraction to addition is introduced with a book and with dominoes. Then, the children explore the concept of missing addends. They also add cards with sums of 4 to their individual set of triangle-shaped flash cards. 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:**Finding Fact Families

**Description:**In this lesson, one of a multi-part unit from Illuminations, the relationship of subtraction to addition is introduced with a book and with dominoes. Then, the children explore the concept of missing addends. They also add cards with sums of 4 to their individual set of triangle-shaped flash cards. Several pieces of literature appropriate for use with this lesson are suggested.

**Thinkfinity Partner:**Illuminations

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

**Title:** Some Special Sums

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students practice doubles and doubles-plus-one addition facts. They record their current level of mastery of the addition facts on their personal addition chart.
**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:**Some Special Sums

**Description:**In this lesson, one of a multi-part unit from Illuminations, students practice doubles and doubles-plus-one addition facts. They record their current level of mastery of the addition facts on their personal addition chart.

**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:** How Many More Fish?

**Description:**
In this seven-lesson unit, from Illuminations, students focus on comparative subtraction. Students use fish-shaped crackers to explore all five meanings for the operations of subtraction (counting, sets, number line, balance, and inverse of addition). In these lessons, students use reasoning, represent subtraction in objects and pictures, and record subtraction in both vertical notation and equations.
**Standard(s): **

[MA2015] (1) 4: Understand subtraction as an unknown-addend problem. [1-OA4]

**Subject:**Mathematics

**Title:**How Many More Fish?

**Description:**In this seven-lesson unit, from Illuminations, students focus on comparative subtraction. Students use fish-shaped crackers to explore all five meanings for the operations of subtraction (counting, sets, number line, balance, and inverse of addition). In these lessons, students use reasoning, represent subtraction in objects and pictures, and record subtraction in both vertical notation and equations.

**Thinkfinity Partner:**Illuminations

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

**Title:** Seeing Doubles

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students focus on dominoes with the same number of spots on each side and on the related addition facts. They make triangle-shaped flash cards for the doubles facts. An extension activity poses a problem that involves dominoes. Several pieces of literature appropriate for use with this lesson are suggested.
**Standard(s): **

[MA2015] (2) 3: Determine whether a group of objects (up to 20) has an odd or even number of members, e.g., by pairing objects or counting them by 2s; write an equation to express an even number as a sum of two equal addends. [2-OA3]

**Subject:**Mathematics

**Title:**Seeing Doubles

**Description:**In this lesson, one of a multi-part unit from Illuminations, students focus on dominoes with the same number of spots on each side and on the related addition facts. They make triangle-shaped flash cards for the doubles facts. An extension activity poses a problem that involves dominoes. Several pieces of literature appropriate for use with this lesson are suggested.

**Thinkfinity Partner:**Illuminations

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

**Title:** Illuminations Activities

**Description:**
This Web page, from Illuminations, allows users to access all of Illuminations' online, interactive activities. The activities span the grades and encompass all areas of mathematics.
**Standard(s): **

[MA2015] (2) 14: Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes. [2-MD1]

**Subject:**Mathematics

**Title:**Illuminations Activities

**Description:**This Web page, from Illuminations, allows users to access all of Illuminations' online, interactive activities. The activities span the grades and encompass all areas of mathematics.

**Thinkfinity Partner:**Illuminations

**Grade Span:**K,1,2,3,4,5,6,7,8,9,10,11,12