[dylan604]

Did the Streisand Effect kick in making you (and/or other students) unable to forget it? "Whoa, teacher says to forget it, so I'm really going to remember it now!"

Come to think of it, if a teacher said to remember something because it will be on a test versus forget something because religious types are upset, I know I'd remember the thing I was just told to forget knowing it now would not be on a test. Then again, as a teen, I was really starting to question the religious part of my upbringing in light of science.

[WorldMaker]

That effect certainly kicked in for me. Led me down several science rabbit holes at a precocious age that I don't think I would have if it was test required.