The Big Dinner — Multiplication with the Ratio Table
Class periods15
Sessions10
Domain focus3.OA
Introduces the ratio table as a powerful tool for multiplicative reasoning and lays a foundation for the development of proportional reasoning and the use of partial products.
1
Pricing the Ingredients
The context of preparing a turkey dinner highlights students' early multiplication strategies.
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2
Buying the Turkey
A math congress gives students a chance to share and discuss their work from Session 1.
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3
Charts for the Grocer — Turkey
A minilesson supports automatization of the basic facts by highlighting number relationships. The investigation and math congress focus on the ratio table and grouping strategies based on distributivity.
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4
Charts for the Grocer — Apples and Carrots
A minilesson further supports automatization of the basic facts by focusing on number relationships. The investigation offers more experience with the ratio table and grouping strategies based on distributivity.
5
Charts for the Grocer — Apples and Carrots (Congress)
A minilesson focuses on the use of doubling and partial products with the basic facts. A math congress focuses on the generalization of the distributive property.
6
Charts for the Grocer — Potatoes
A minilesson, investigation, and math congress all encourage use of the distributive property over subtraction.
7
Playing with Nines
A minilesson, investigation, and math congress all focus on the patterns that emerge when calculating with the number nine.
8
Buying the Groceries
A minilesson and investigation support students in becoming more flexible in using the distributive property over subtraction.
9
Cooking the Dinner
A minilesson introduces doubling and halving as a helpful strategy for automatizing the basic facts. The investigation encourages the use of various strategies developed in the unit.
10
Cooking the Dinner (Congress)
A minilesson supports the generalization of the doubling and halving strategy. A math congress gives students a chance to share and discuss their work from Session 9.
Minilessons for Early Multiplication and Division (B1–B12), using connecting cubes with the open number line — for on-going fluency support alongside the Landscape of Learning for Multiplication and Division.
