According to me, you should NEVER have fought with your teacher as that is extremely disrespectful, doesn't matter if she is wrong.
Apart from that i think you are correct in this as you just want to do some work on pc just for practicals, no big deal. The reason why she called your parents is
utterly a dumb one as i think she certainly has resentment against you.
I think you should talk to your parents about this, i am sure they will understand it and apart from that you can also do it at your home, what's the problem in that? A 'fight' should be neglected especially, if it is with your teacher as i am sure you would never want any bad for yourself. So, there's no big deal in what has happened. Forget it and do your practicals at home. That's the only way out.