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    PBS
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    In this math lesson, learners are given 15 chips and a number line labeled from 2-12. They are instructed to place their 15 chips on the numbers which they think will represent the sums when two...

    free Ages 11 - 14 45 to 60 minutes
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    Children's Museum Of Houston
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    In this game, learners strategize to be the first player to make three in a row. This game is similar to the classic Tic-Tac-Toe game, but learners slide game pieces along lines, instead of filling...

    1 cent - $1 per group Ages 8 - 11 5 to 10 minutes
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    Children's Museum Of Houston
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    In this activity, learners practice matching and subitizing as they create the longest domino train possible.

    $5 - $10 per group Ages 4 - 8 10 to 30 minutes
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    Children's Museum Of Houston
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    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. This lesson plan contains Texas...

    $1 - $5 per group Ages 6 - 11 5 to 10 minutes
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    Computer Science Unplugged
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    In this puzzle, learners investigate the decisions involved in linking a network between houses in a muddy city. It can lead on to a discussion of minimal spanning tree algorithms for optimizing...

    1 cent - $1 per student Ages 8 - 18 30 to 45 minutes
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    Twin Cities Public Television
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    This activity (on page 2 of the PDF under SciGirls Activity: Tug O' War) is a full inquiry investigation into tug-of-war physics. Groups of learners will test two tug-of-war strategies. Which...

    $10 - $20 per group Ages 8 - 14 2 to 4 hours