Don't assign homework until the very end of the class period. (thoughtco.com)
In fact, for the enthused teachers — those en theos, Greek for «inspired by a god» — you had to practically kick them off stage at the end of the class period. (sciencemag.org)
Tip 6 Return test papers at the end of a class period — not at the start of a class period. (educationworld.com)