The bell rings and the stundents enters the classroom. After they sit in their respective chairs teacher Harry starts his basic math class. It all goes as usual, just this unique time his students notice he is quite rushy, they don't know why. Just a couple minutes before the bell rings again to finish his class he take his opportunity.
Teacher Harry was whimpy guy in his mid 40's, brown haired, white, and gay. A scientist who had worked on many secret projects for the government, he was noticed for his discoveries on time manipulation, although he wasn't a physicist he worked alogn with many and he was the one who made possible the accessability to other universes or realities, making possible to travel across the fifth dimension. His latest project involved body modification, which turned him on, but he was fired after a controversy leaked into social media about those experiments involving human subjects, the matter was to create super humans. The government had no other choice rather than ending Harry's current project, firing him and his team, although they kept all the scientists identities in anonymity, Harry did not give up for it, and retained all the information he could and kept working in his appartment.
Then he found a job as a math teacher. During all this time he managed himself to create a remote control that would modify any trait of a person, including age, muscles, sex, race, height, and would shape reality if wanted, to fit the new human being. He tested it many times before and altered reality so nobody could ever notice the changes.
This time he was about to do the same thing with his entire classroom.