Here are some links to optical bench experiments, simulators, demonstrations, etc.
An old optical bench lab experiment. Similar to what we'll do in class.
This is a java applet bench simulator. You can see the rays, place lenses, mirrors, etc.
Here's the link to the explanations for the above simulator:
Here are the instructions to Central Scientific's optical bench kit:
Another instruction set for another bench kit:
Finding the focal length of a convex lens by the displacement method: