If he's reading Harry Potter with such enthusiasm its probably worth putting him in a Harry Potter class. ....The class is less demanding than the literature class but is extremely useful with the focus on reading, comprehension, grammar and pushing their thinking skills up a few notches (according to Blooms taxonomy). There is homework but I restrict it to 20 minutes per week so its do-able! We basically do a chapter a week and discuss the issues that arise in the chapter, check grammar, vocabulary etc. Very much the sort of thing he needs. We do quite a bit of reading aloud.