Topic: Looking at blood with bright field, dark field and phase contrast. You can see the red blood cells (erythrocytes) quite well. I bumped my head on the corner of the car door unloading some shopping.
A wet mount uses a liquid mounting medium, in most cases water.
Phase Contrast microscopy makes specimens of low contrast appear with greater contrast.
Microscopes have a large price span, ranging from cheap to in-affordable. Especially in an educational setting, money may play an important factor – money which should be well spent, and maybe not even spent at all on unnecessary microscope features.