Go with what your teacher says . If s/he says 'using moves from today's class/this term', then leave your funky moves for another time. If s/he just says to improvise, use all the bellydance tools you have at your disposal.
Thanks, that's what I figured.....Some of the other dances in the class have had more experience, and they stick to what she's said. It's a level 1/level 2 mixed class.