Thank you all for your suggestions and advice, I really appreciate it. My role is simply to be a "math tutor" in this situation. His dad is providing all the home school curriculum, both are committed, and this kid is going to be just fine imo. Actually he's always been in a good school system, so from what I can tell, that's not an issue. His algebraic skills, logic, and problem solving are fairly good based upon his work that I've examined and from spending some time the other day asking him to explain his logic in solving some "real world" pratical math problems. According to him, taking standardized tests isn't his strong suite so that's how I intend to assist, by helping him prepare for taking his ACT (or whatever the CC he intends to enroll in requires). I always excelled at taking standardized tests, particularly math, and informally tutoring others, so I'm pretty sure I can help, I just need to figure out a game plan.
I understand what you guys are saying about the social aspects. He's got that side covered imo...dedicated hockey player since he was 10 or so, works part time, popular, positive influence of a nice g/f (she's sharp, math just isn't her thing), and he already has a "plan" for going to CC, getting a degree and starting a business. IMO, he's going to be better off by taking this "short cut", and getting away from some of his long time neighorhood & school friends that are making some seriously bad choices.
I think I will simply focus on helping him prepare for the math portion of the ACT. I know I can do that, I just need to figure out how

. Thanks again everyone!