I think the majority of JW's attempting to home school their kids dont have a clue what they're doing. If done correctly it can work, sure, but why do it unless you absolutely have to?
The social skills one learns in school are very important as far as im concerned. In my JW days two of my ex-girlfriends were home schooled and both had no idea how the real world worked and had this annoying sense of entitlement.
Unless you're living in a secluded location i'd choose a qualified teacher any day of the week.