Facilitator of Professional Development course answers my question of “What is a rich task?”
“It’s a problem that has multiple entry points and has various levels of cognitive demands. Every student can be successful on at least part of it.”
My translation: A one-off, not generalizable, ill-posed, open-ended problem which can be answered in many ways. Thought to gauge understanding, as opposed to traditional “only one right answer” problems that are viewed as helping only a few students–students who are viewed as “getting it” no matter what.