Goosebumps

Brian 'O Connor dresses up as a burglar to scare his little brother Riley, so his parents finally decide to teach him a lesson. They send him to ""The Perfect School"". There, the headmasters are strict. The instructors are even stricter. But Brian and his two friends have noticed something strange about the school. And how perfect they make the students. But the school makes them ""perfect"" in such a short amount of time. When Brian tries to escape, he is countered by numerous guards, but finds a box of ""tissue samples"". But then a horrific thought comes to mind. That the school might be cloning the children and making them perfect.