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In this math lesson, learners count and compare amounts of money less than or equal to one dollar.

In this activity, learners build a game that tests their steadiness. Learners construct the game board by setting up an electrical circuit and a wand.

This activity lets you program your 'robot' (a willing friend) to pick up and dispose of some 'toxic waste' using as few commands as possible.

Players take turns adding shapes made of three squares to a grid. They try to fit their shapes on the grid in a way that blocks the other player.

This activity explores the main algorithms that are used as the basis for searching on computers, using different variations on the game of battleships.

As learners play this strategy game, they develop understanding of squares, area, and perimeter. On each turn, a player draws a line between two dots next to each other on the grid.

In this activity, learners create a mind and math puzzle that requires a three-dimensional solution.

In this math game, learners try to earn the most points by winning stacks of four dice. Learners practice number recognition and addition skills.

In this fun math activity (page 5 of the pdf), learners will help a secret agent crack a case by solving math problems.

In this hands-on engineering project, kids use two simple machines, levers and inclined planes, to construct their own pinball machines.

In this game, learners build up six stacks of cards in the middle of the table, face up, in order from 1 at the bottom to 20 on the top. The first player to get rid of all his cards is the winner.

In this activity, learners will design a protective package for an egg that will allow the egg to withstand a fall without cracking.

In this seismic simulation, learners play a "who-dunnit" game to explore earthquakes.

In this math puzzle game, learners work together to use algebraic reasoning and fun clues for solving word puzzles.

In this outdoor activity and game, learners explore how animals adapt for survival through coloration, markings and camouflage.

Learners test their "light-smarts" by playing a game called "Light Quest!" The game board represents an atom and each player represents an electron that has been bumped into the atom's outer unstable

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.

In this invention challenge activity, learners create an indoor game for one or two people that gets you moving.

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