After reading this, I'm going to guess that your parents want you to fail and come crawling back to them, and beg for forgiveness. They are going to be furious when you don't fail, and may do everything in their power to cause you to fail. I would suggest the following things:

1. Record everything until you get kicked out, as well as subsequent conversations. Tell them they are being recorded for everyone's protection. My guess is that they may try to report you as a runaway if you don't return or they have a change of heart.

2. Get them to put in writing that you are being kicked out, and why, and the date, etc. You should sign it, and so should they. Keep the original, and get them a copy. This will hopefully further protect you legally, and making your parents put in writing why they are kicking you out while they are still legally obligated to provide for your well-being may cause them to have a change of heart.

3. Talk to a lawyer, solely for the purposes of emancipation. Talk about protecting the use of your identity for credit purposes, and get identified as independent in terms of taxes and financial aid for college.

4. Find a way to get your mail diverted somewhere.

5. Close your bank accounts, and take the cash. Try to stay bank-free until your 18th birthday.

6. Stay away from drugs, and paraphernalia. Keep your nose clean.

7. Don't get the authorities involved unless absolutely necessary. It may be a good idea to let a high school counselor know, so its on record, but you want to avoid getting charged for anything, or getting into the "system" or a foster home. I know many have been raised in foster care and turned out alright, but I think you'd be better off laying low, staying in school, and sleeping at a friend's house until you reach 18. Don't have the cops force them to take you back.