1. Expt 1: Focal Length Parallel light rays from far away light source
Lens # 1
Screen
Move lens until the image of light source appears on the screen

2. Light Unit Plastic ruler is on the light source! mm
Face view mm
The manual instructs students to use the plastic ruler to measure the source size. They immediately rush to a meterstick. I always laugh. Ha, ha, ha!
Plastic ruler is on the light source!
Inner circle diameter: 10 mm

3. Expt 4: Depth of Focus (Field)
Top view
Aperture
Light Unit
Lens # 2?
Move screen
Many students get lost on what the manual is trying to instruct. They need to measure and compare the range of good focus for two different aperture sizes.
Find the range (depth) of good focus

4. Expt 5: Spherical Aberrations and Curved Focal Plane
Top view
Aperture
Screen
Light Unit
Lens # 1
Move lightly
Aperture
Peripheral Mask
Central Mask
One of the hardest experiments. I would suggest to do this experiment the last. The effect we see are sometimes small for unknown reasons. Students need to be pointed out on what changes they are seeing and why they are worth noting!
Examine image qualities

5. Expt 6: Chromatic Aberration
Top view
Aperture
Roscolux
Filters
Light Unit
Lens # 2?
A lighter color filter usually passes through green/yellow spectrum which result in less dramatic difference in focus point. But #27 (4% transmission) and #83 (4% transmission) filters may be too dark in a brighter room... You could try #80 Primary Blue (9% transmission) and #26 Light Red (12% transmission).
Adjust screen
#27 Medium Red
#83 Medium Blue
Compare the position of good focus