Throwing a basketball sized ball seems a bit odd to me. Shooting sure, but throwing it with one hand? When I played basketball we typically threw it with two hands. Footballs and smaller balls with one hand. I can throw a football with a decent (but not great) spiral. Baseballs, on the other hand, I'm pretty good with. I have no clue how to teach someone to throw. For me the better grip I can get on the ball the better I can throw it.