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In this activity, learners use number sense and mental math strategies to estimate the price of a sign.

In this math activity, learners play a number game to explore the relationships between numbers, combinations, and the concept of equivalency.

In this math activity, learners play a game and use a variety of strategies to solve a hidden number problem (or missing factor). Learners practice their number and operations skills.

In this online activity, learners crack the special code imprinted on envelopes to help the U.S. Postal Service deliver the mail.

In this math activity, learners create a magic turtle where all the rows, columns and diagonals add up to fifteen.

In this math lesson, learners are given 15 chips and a number line labeled from 2-12.