After finishing a topic, or even after watching an educational film/clip I use this sheet to get some feedback from the students. Sometimes I will even have them fill it out after reading an informational text.
The sheet asks them to summarize:
3 facts they learned,
2 questions they still have, and
1 opinion they have now
It's a good way to get some feedback and helps the students think about what they've just watched/read/learned.