Supports the development of quantity by using benchmark numbers, thinking flexibly about composing and decomposing numbers, and building facility with figuring sums.
A: ADDITION WITH SUMS UP TO 100
Builds on the big idea that “10” is an organizer for our number system.
B: SUBTRACTION WITH NUMBERS UP TO 100
Reinforces addition and subtraction as inverse operations and teaches the three meanings of subtraction: take-away, missing parts, and comparison problems.
C: NUMBERS GREATER THAN 100
Applies these big ideas to calculations with greater numbers and provides strategies for solving word problems.