Still having your intelligence the lesson was absolutely mind-numbing. This was easy and everything, but you had changed the high school to an elementary school more or less to see if you could. Plus the young body is boring, Ms. Teacher had a nice rack and your pre-pubescent dick wasn't even stirring. You then tapped your wand on your groin and felt your pants get much tighter as your balls were dropping and your penis was extending several inches. Now looking at Ms. Teacher's lumps did grant some stirs. Now to a glance to the girl with the largest rack you looked to Kimberly and was granted with a completely flat chest.
Whatever you took them out of the world so you should be able to bring them back into the world. Under the desk you waved your wand towards Kimberly who suddenly felt a bit more weird. She looked to her chest as her nipples started getting itchy as they started to swell, and be very visible through her shirt. Kimberly raised her hand and when she was called on Kimberly asked "Can I go to the nurse's office, something weird is..." she moaned a little as A-cups started forming, and the growth was only continuing to increase. No matter how big they were the youth of Kimberly kept them nice and perky as they perked her shirt up showing her navel off pretty well. And as soon as you started to think it was weird ogling a 6-7 year old's waist area her waist area seemed to mature a bit as well as her figure started getting curvy.
Ms. Teacher seeing Kimberly's predicament said "Yes, let me help you get to the nurse office!" and then shooed her out of the room leaving you with an omnipotent wand and a room full of little kids.