iNaturalist.org is a place where you can record what you see in nature, meet other nature lovers, and learn about the natural world. It has a very handy app that students can use on "BioBlitz" field trips to snap pictures of biodiversity in their community to upload to the database. The best part is that you don't even have to know what it is. See a cool mushroom? A fantastic spider? An interesting plant? Upload the picture and the iNaturalist community will help you identify it. Pictures of high quality will even be tagged as "research grade" for use by researchers studying biodiversity, conservation biology, invasive species, ecology, zoology, etc.
Download app from this site