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In this activity (page 2 of pdf), learners craft a model of a skate egg case and come to understand that cartilaginous fish such as sharks and shakes employ reproductive strategies that differ from th

1 cent - $1 per student Ages 6 - 11 1 to 7 days
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In this activity, learners touch and observe skulls of sharks and rays to learn about their diversity (over 400 species of sharks alone!).

Over $20 per group Ages 4 - adult 5 to 10 minutes