Discuss with your students the habitat needs of tadpoles versus frogs. Create a habitat design for the tank. Be sure that students provide a gently sloping place where the froglets can crawl out of the water. When the froglets are ready to leave the water, they must be able to do so quickly, or they may drown. A small pile of rocks is fine.
Driftwood also works, but avoid all types of treated lumber.
Have students return amphibians to their natural habitat. After students complete their observations, have them release the critters back into the wild where they were originally collected as eggs or larvae. Have students find the flags used to mark the location of collection or follow the property map they marked when collecting eggs. Do this before the end of September so the froglets have time to find places to hibernate for the winter. Discuss how some amphibians migrate to find the habitat they need during the winter, and what type of habitat each one needs during different times of the year.