How do you start home schooling your children in Wisconsin?

BetteBoop asked:

I have a 14 year old autistic son who is having major problems in school with children picking on him so I have decided to home school him. I need to know where to get the info for home schooling in Wisconsin.

I need this ASAP. My son had a major melt down at school yesterday and he had to be taken away by the police for the safety of the other children. This is very serious! I don’t want to see anyone get hurt or him put into an institution. Please send any info you have.
Thanks!