Present them in collections (amalgam,composite, CRN & br, endo, etc.) and try to find their photos (if you don't have a DA textbook, the dental directory is the best). Most of the "basics" are the same (mirror, explorer, cotton pliers, spoon excavators). Once she had passed them, she taught everyone every step, in the order they used... Amalgam carrier, condenser, carver, burnisher...
Not only do you have to teach the names of the instruments, but you also have to teach them why to use them... It will help.
Repetition is the best way to remember anything... Remember you learned forks, knives and spoons? The principle is the same...
Good luck to you.
