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Hi Alexis,
Making first-hand observations of living organisms, especially those that go through a growth process so different from our own, is especially memorable for children. Check with naturalists in your area about the season for frog egg-laying and opportunities for observing tadpoles they have. If you have already have local tadpoles or frogs in the classroom sure to follow the rigorous cleanliness guidelines from the Society for the Study of Amphibians and Reptiles (SSAR), 'Considerations and Recommendations for Raising Live Amphibians in Classrooms,' in Herpetological Review, 2009, 40(2), 142–144. There is 'a real potential risk of transferring non-native pathogens back into the natal pond of the amphibians included in the classroom exercise.'
See the list of resources at the end of the article for options that are not hands-on.
Best wishes,
Peggy
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