Student warm-ups and presentation topics are generally better when they are directly connected to the topic being discussed in the classroom.
Sometimes, though, for a change, it can be nice to provide students with more choice.
Here are a few places that provide long lists of prompts:
Oxplore provides prompts, along with related resources students can use to explore those topics further.
Kialo does the same thing.
KQED’s Do Nows also offer questions and resources.
The NY Times Learning Network offers daily questions.
