An acceptable answer would be to describe a train and a bicycle as forms of transport; an unacceptable one would be to say they both had wheels.

That's really the only acceptable answer.

Yes and no are perfectly acceptable answers to almost every question.

Acceptable answers that are proper nouns using alliteration score one point for each word using the letter.

Teachers can set expectations, time, kinds of tasks, questions, acceptable answers, and type of discussions that will influence students' opportunity to learn.