Join two sets of objects to make one large set in the context of daily routines of play (e.g., combining 2 bags of raisins, each containing 3 pieces; combining 2 groups of blocks, each containing 3 blocks).

Model and represent addition as combining sets and counting on, and subtraction as take-away and comparison. For example:
a. Combine and separate small sets of objects in contextual situations; e.g., add or subtract one, two, or another small amount.
b. Count on (forward) and count back(backward) on a number line between 0 and 10.

Model, represent and explain addition as combining sets (part + part = whole) and counting on. For example: a. Model and explain addition using physical materials in contextual Situations. b. Draw pictures to model addition. c. Write number sentences to represent addition. d. Explain that adding two whole numbers yields a larger whole number.

Use conventional symbols to represent the operations of addition and subtraction.

Model and use the commutative property for addition.