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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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    American Chemical Society
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    In this activity on page 4 of the PDF, explore the unique molecular structure and conductive nature of graphene. Learners construct a circuit with a battery and LED bulb. Then, they examine what...

    $10 - $20 per student Ages 8 - 14 5 to 10 minutes
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    American Chemical Society
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    In this activity on page 10 of the PDF, learners develop an experiment to answer the following question: "How much water can the hydrogel in a baby diaper hold?" Use this activity to...

    $1 - $5 per student Ages 8 - 18 10 to 30 minutes
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    American Chemical Society
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    In this activity on page 13 of the PDF, use a special plastic card that has been painted with a chemical that changes color when it is in UV light. Examine how the more UV rays there are, the...

    $5 - $10 per student Ages 6 - 14 10 to 30 minutes
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    Computer Science Unplugged
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    In this activity about computer programming, learners follow instructions in a variety of ways in order to successfully draw figures. Through these exercises, learners will experience some of the...

    1 cent - $1 per group Ages 6 - 18 45 to 60 minutes
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    American Chemical Society
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    In this activity on page 15 of the PDF, discover how materials and physical forces behave differently at the nanoscale. Learners experiment with water to see how the effects of surface tension...

    $1 - $5 per student Ages 6 - 14 10 to 30 minutes
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    Computer Science Unplugged
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    This activity introduces the idea that computer scientists measure information by how "surprising" a message is. Learners play the game "20 Questions" and use the number of...

    free Ages 8 - 14 30 to 45 minutes
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    Computer Science Unplugged
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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. This activity demonstrates three search...

    1 cent - $1 per group Ages 8 - adult 30 to 45 minutes
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    Computer Science Unplugged
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    This magic trick is based on how computers detect and correct data errors. In the trick, a volunteer lays out a 5 x 5 square of identical cards colored on one side, with a random mix of sides...

    1 cent - $1 per group Ages 8 - adult 30 to 45 minutes
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    PhET
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    In this online interactive simulation, learners will add different salts to water and then watch the salts dissolve and achieve a dynamic equilibrium with solid precipitate. Learners will also...

    free Ages 8 - adult 10 to 30 minutes

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