No matter what age (after about 8YO) I would spend
- 15-20 minutes teaching camera operation and very basic composition (basically spend the time making sure everyone understands how to operate the camera they will be using,
- 15-20 explaining shutter, aperture, ISO versus exposure relationships (Don't expect them to retain all of this, the goal is for them to understand there is a relationship, not at this point how they are related.
- The final 20-30 minutes of the first hour with a quick assignment (such as
A. Bird's Eye, Worm's eye view (high shooting down, low shooting up)
B. Close, Closer, Closest (should be obvious - but if they have zoom have them shoot one set with the zoom and then one walking up to the subject)
C. Abstract (for older kids and adults)
(Pick one of the above for everyone - use a different one the next time you teach the class)
Then spend the next hour showing off every one's photos and as you go through them explain what was done right, what was done wrong and what could have been done better. Make sure to get through at least one of every kid's photos. This last is more important then the comments for a single 2-hour class.
Just my experience and opinion,