A fantastic, and large, set of physics questions:
Next Time QuestionsThe author, Paul Hewitt, suggests you do not provide the answer until the following week or next lesson.
Their educational value is the long wait time!
Paul says "When they’d ask for early “official” answers, I’d tell them to confer with friends. When friends weren’t helpful, I’d suggest they seek new friends! It is in such discussions that learning takes place."