As we get into the spring season there are a variety of citizen science programs you and your students can participate in to identify local amphibians that are coming out of hiding.  Citizen science reporting can lead to interesting discussions about why some students hear more than others depending on the habitats near where they live.  

Field Guide to MD Frogs & Toads is a field guide to all 20 species in Maryland with a dichotomus key that can be used for positive identification of most species. This site has more detailed information on each species and distribution maps for where each species can be found in Maryland. 

Maryland Amphibian and Reptile Database is also run by DNR and they also have an extensive local database in the that was generated by local naturalists and state scientists that anyone can access for free.

Frogwatch is very active in Maryland.  This program is run by the Association of Zoos and Aquariums, and if you join and register you can contribute to their database.  Without registering you can use this link to see pictures and hear sounds of all our local frogs and toads.