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In this web-based activity, learners try to figure out who in an online chat room has their matching puzzle piece.

$1 - $5 per group Ages 11 - 18 45 to 60 minutes
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In this activity about encryption, learners cut out a secret decoder badge from a handout and use it to encode messages to each other.

1 cent - $1 per student Ages 8 - 14 30 to 45 minutes
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This activity (on page 2 of the PDF under SciGirls Activity: Earthquakes) is a full inquiry investigation into aerial imagery.

free Ages 8 - 14 45 to 60 minutes