"I wish that while I'm not possessing other people's bodies, I can turn into my normal body if I want to. There. That should do it." Mikey set down the stone on his desk and walked back up to the front of the class.
All the students were talking ammonst themselves, like Miss Warren wasn't even there. Mikey got an idea. Since nobody could pay any attention to him. He carefully undid Miss Warrens' bra and slipped it out from under her suit. He then walked over to her desk and put it in her briefcase that was sitting on her desk.
Then he willed himself out of her body and appeared in his own body at his own desk.