It is child abuse, and you should be talking to your guidance counselor or the school nurse about it. It isn't good parenting, although sadly it isn't uncommon- but common doesn't make it right. breaking things and harming you are abuse, and it needs to be stopped.
If you don't feel you can go to the people at school - who could help you report it to CPS- you can call here:
http://www.boystown.org/hotline