There are 40 questions about lenses & the images they form, then it goes through all the questions again with the answers. It is editable - swap out the questions you don't like.
I originally made this powerpoint as a review for Chapter 30 in the Hewitt Conceptual Physics book. Groups of 3 students shared a computer & discussed answers. It would be a great substitute plan if you add specific directions for you class on the directions slide.
I use this as a quick class review (orally together) for my AP Physics class too.
This WON'T work for you if you don't refer to the 3 principle rays as #1 (in parallel), #2 (doesn't bend), #3 (out parallel).
Topics: converging & diverging thin lenses, virtual & real images.
The free preview shows 8 of the slides