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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.

free Ages 4 - 14 10 to 30 minutes
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This activity explores the main algorithms that are used as the basis for searching on computers, using different variations on the game of battleships.

1 cent - $1 per group Ages 8 - adult 30 to 45 minutes
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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.

free Ages 4 - 14 10 to 30 minutes
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In this activity, learners create a mind and math puzzle that requires a three-dimensional solution.

$1 - $5 per student Ages 8 - 18 1 to 2 hours
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In this online brain stumper, the bottom half of a series of letters is covered. You may think you know what it says, but remove the black bar to see if you're right.

1 cent - $1 per student Ages 8 - 14 5 to 10 minutes
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This activity introduces the idea that computer scientists measure information by how "surprising" a message is.

free Ages 8 - 14 30 to 45 minutes
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In this math game, learners try to earn the most points by winning stacks of four dice. Learners practice number recognition and addition skills.

$1 - $5 per group Ages 8 - 11 10 to 30 minutes
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In this fun math activity (page 5 of the pdf), learners will help a secret agent crack a case by solving math problems.

free Ages 8 - 11 30 to 45 minutes
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In this online Flash game, learners will explore a coral reef using an underwater remotely operated vehicle (ROV).

free Ages 6 - 14 5 to 10 minutes
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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.

1 cent - $1 per group Ages 6 - 11 5 to 10 minutes
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In this sorting activity, learners play a game in which they try to identify the largest number of differences between two objects.

free Ages 8 - 11 10 to 30 minutes
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In this online Flash game, learners will captain a sailing challenge, adjusting boat direction and sails, seeking the way to take greatest advantage of varying wind speeds and directions to catch the

free Ages 6 - 14 5 to 10 minutes
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En esta tira cómica, Cientina le enseña a Mateo un truco de lógica nuevo con seis tarjetas.

free Ages 6 - 11 5 to 10 minutes
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In this math puzzle game, learners work together to use algebraic reasoning and fun clues for solving word puzzles.

1 cent - $1 per group Ages 8 - 14 45 to 60 minutes
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This fun and simple hands-on astronomy activity lets learners explore model planets (that they or an educator will create), using methods NASA scientists use to explore our Solar System.

per group Ages 8 - adult 30 to 45 minutes
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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

1 cent - $1 per group Ages 8 - 11 10 to 30 minutes
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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.

1 cent - $1 per student Ages 8 - 14 45 to 60 minutes
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The popular sudoku puzzles use numbers, but the game could played with any set of 9 different objects!

1 cent - $1 per student Ages 8 - 14 45 to 60 minutes
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In this Cyberchase activity, learners use numbers to create CyberOlympic teams with the fastest times.

1 cent - $1 per group Ages 8 - 11 10 to 30 minutes
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Este Web site contiene links a 12 calendarios (12 meses). Cada mes contiene actividades sobre matemáticas.

1 cent - $1 per group Ages 4 - 14 1 to 2 hours