**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:** Hopping on the Number Line

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students generate sums using the '' number line'' model. This model highlights the measurement aspect of addition and is a distinctly different representation of the operation from the model presented in lesson one. The order property is also introduced. At the end of the lesson, students are encouraged to predict sums and to answer puzzles involving addition.
**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:**Hopping on the Number Line

**Description:**In this lesson, one of a multi-part unit from Illuminations, students generate sums using the '' number line'' model. This model highlights the measurement aspect of addition and is a distinctly different representation of the operation from the model presented in lesson one. The order property is also introduced. At the end of the lesson, students are encouraged to predict sums and to answer puzzles involving addition.

**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:** Numbers Many Ways

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students work with subtraction at the intuitive level as they explore number families and ways to decompose numbers to 10. They also identify members of fact families.
**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:**Numbers Many Ways

**Description:**In this lesson, one of a multi-part unit from Illuminations, students work with subtraction at the intuitive level as they explore number families and ways to decompose numbers to 10. They also identify members of fact families.

**Thinkfinity Partner:**Illuminations

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

**Title:** Giant Story Problems: Reading Comprehension through Math Problem-Solving

**Description:**
Students create posters using images, text, and mathematical equations to represent a story problem.
**Standard(s): **

[ELA2015] (2) 27: Participate in shared research and writing projects (e.g., read a number of books on a single topic to produce a report; record science observations). [W.2.7]

**Subject:**Language Arts

**Title:**Giant Story Problems: Reading Comprehension through Math Problem-Solving

**Description:**Students create posters using images, text, and mathematical equations to represent a story problem.

**Thinkfinity Partner:**ReadWriteThink

**Grade Span:**1,2

**Title:** Try for Five

**Description:**
In this lesson, one of a multi-part unit from Illuminations, students explore the many ways to decompose numbers and then build on their knowledge of addition and subtraction to find missing addends. They also visit a Web site related to the food pyramid.
**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:**Health,Mathematics

**Title:**Try for Five

**Description:**In this lesson, one of a multi-part unit from Illuminations, students explore the many ways to decompose numbers and then build on their knowledge of addition and subtraction to find missing addends. They also visit a Web site related to the food pyramid.

**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:** 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