I can draw pretty realistically if I have a model in front of me (a real person, someone on t.v. or on the pc w/e) but I'm having a LOT of problems drawing from memory and imagination. I'm currently taking a few classes at the nearby Micheals and the teacher there has had me doing a few drawing exercises but they don't seem to be helping.

Any suggestions?

Pic related, something I've drawn with a model in front of me. (Sry for crap quality)