Junior+Math


 * // Members: Mel F., Danielle W. & Jane T. //**


 * // Junior Math //**- Multiplication


 * Grades: 3-5**

unitizing repeated additions can be regrouped the distributive property of multiplication (over addition and subtraction)
 * Big Idea:** Students will develop some of the big ideas related to multiplication

the commutative property of multiplication the place value patterns that occur when multiplying by the base

How can you use the grocery store picture to demonstrate efficient ways to determine the quantities of the various items in the store? Students working in pairs examine the image (grocery store picture) and record the quantities of items and strategies on chart paper.
 * Critical Challenge: //Critique the Piece//**

Put poster up, ask students to describe what they see. Focus students attention on the apples and ask them to consider short cut ways to figure out the amount of apples. Comment about looking for fast and efficient ways of calculating. Tell the students that today they will work as mathematicians to find clever ways to determine the totals of each of the items they see in the poster.
 * Setting the Context:**

Key Learning/"Big Idea"**
 * Objectives:


 * Overall Expectations Evaluated- //Number Sense and Numeration//**

- solve problems involving addition, subtraction and multiplication of single and multi-digit whole numbers, using a variety of strategies.

- demonstrate an understanding of equality between pairs of expressions, using addition, subtraction and multiplication.
 * Patterning and Algebra-** describe, extend and create a variety of numeric patterns, making predictions related to the patterns


 * Specific Expectations- //Number Sense and Numeration//**

- add and subtract two-digit numbers, using a variety of mental strategies - multiply to 9x9 using a variety of mental strategies - solve problems involving the multiplication of one-digit whole numbers, using a variety of tools, student-generated algorithms and standard algorithms.

-identify, through investigation, and the use of the commutative property of multiplication to facilitate computation with whole numbers. -identify, through investigation, and the use of the distributive property of multiplication over addition to facilitate computation with whole numbers
 * Patterning and Algebra**- extend, describe, and create repeating, growing and shrinking number patterns.


 * //Prequisite Tools://**
 * Background Knowledge**- grocery store experience, addition strategies, number patterns, grouping of items,


 * Criteria for Judgement**- efficiency


 * Critical Thinking Vocabulary**- efficient, accurate, quantity, demonstrate, determine, various, grocery store


 * Thinking Strategies**- This is what we are assessing


 * Habits of Mind**- Fairminded, attentive to detail, accurate, quantity, demonstrate, determine, various, grocery store


 * Thinking Strategies**- This is what we are assessing


 * Habits of Mind-** Fairminded, attentive to detail


 * Session 2

Big Idea-** Same as day one

//**Rework the piece**// design their own stamps with quantities of their choice, put into arrays that will help them to show the effecient ways to findout the quantities of their stamps.
 * Critical Challenge-**

Looking at stamps from various countries students look at patterns that they see and discuss as a group. Students will see different groups of numbers and how they relate. As a whole class discuss the various ways to find thesum of each set of stamps, they are to show this work and explain their thnking for the rest of the class. Tell the students that they will be creating their own sets of stamps to show their thinking on the chart paper.
 * Setting the Context**