From Wikipedia:

Welcome to the Dollhouse is a 1995 American coming-of-age black comedy film written and directed by Todd Solondz.[2] An independent film, it won the Grand Jury Prize at the 1996 Sundance Film Festival and launched the careers of Solondz and Heather Matarazzo.[3] The story follows the unpopular middle schooler Dawn as she goes to extreme lengths trying to earn the respect of her vicious fellow students and her uninterested family.