A portfolio is a collection of a student's work gathered over time. should a teacher elicit ideas from students/

No. Teachers should never encourage students to come up with ideas. It could lead to learning, God forbid. And learning could lead to intelligence, productivity and prosperity. And we certainly don't want any of that.

Don't worry about leftists actually learning: they only go to college on mommie and daddy's money to get out of work for six years to get a four year degree.  Even so they don't earn that four year degree in that six years: the college merely gets fed up with their idiotic antics and graduates them with phony degrees just to get rid of them.

Any way you look at it, that is the correct move.