A glossary or database could be used for uploading images for students to view. The glossary set up is simpler but the database has more frills. Use the encyclopedia type of glossary to show one uploaded file per entry or use the add image on the toolbar to add multiple images to the entry. There is a built in preset for the database called image gallery that will get you started and then you can add other fields as you need them. Glossary and database entries are searchable.