Thanks all for the inputs. I live in Washington and I understand homeschooling is allowed, but I do not know about the partial part. I might have to talk to the principal in fall and see if that will work.
I have a few other questions. For LA, science etc.. Should it be online or through books? I think there exists both types. I checked WTM and RFP. Should I be the one who teaches him the subjects with the help of these books, if I do not want him to do things online? I am starting to do some experimentation on hs already as you have mentioned.