Useful resource for getting familiar with microscope skills.
BioNetwork's Virtual Microscope is a fully interactive 3D scope. It's a great practice tool to prepare you for working in lab!
These videos show some nice compound light microscope images. The second video also covers the topic of objectives and magnification. However, it does display a student using the microscope in the backwards position. How embarrassing! I am confidant that you would never make that mistake.