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In this activity (on pages 41-47 of PDF), learners explore tesselating geometric patterns (repeated shapes, similar to the art of M.C. Escher).

In this tabletop activity (on pages 32-40), learners make Möbius strips -- 3D surfaces with only one side.

In this math activity, learners play a probability game and try to be the first to get to the end of the game board path .This activity guide contains a material list, black line masters for the game

This lesson (on pages 46-55 of PDF) features two strategy board games -- one from Ghana and one from China. The first game, Achi, is a cross between checkers and tic-tac-toe.

The popular sudoku puzzles use numbers, but the game could played with any set of 9 different objects!

In this activity about problem-solving, learners build a house for the Three Little Pigs using twenty straws and two index cards.

In this activity, learners explore geometry and spatial relationships as they figure out how to arrange tables for a party.

In this classic memory game (on pages 37-45 of PDF), learners turn over tiles to reveal images on the back.

In this math activity, challenge learners to make two equal rows from eight different paper strips. Learners can explore the many ways they can solve this problem.

In this activity (on pages 49-54 of PDF), learners play with tangrams, a set of triangles, squares and a parallelogram that can combine into a larger square as well as all sorts of other shapes.

In this Cyberchase activity, learners use the numbers one through six to solve a puzzle.

In this activity learners will build roller coasters and test them using small balls or marbles.

This activity (on pages 21-32 of PDF) has learners act out several classic brain teasers.

In this math lesson, learners are introduced to proportional reasoning through modeling, sharing, and questioning techniques.

In this hands-on activity, learners use toothpicks to build different triangles and squares and then use the toothpicks to build and solve some tricky shape puzzles.

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

In this activity (on pages 55-66 of PDF), learners fold paper into origami shapes and then combine several identical shapes into a three-dimensional structure.

Use multiplication to help the aliens find out how much fuel they need to get their spacecrafts home.