I don't want him to feel like he can just skip something because he is not interested. In school there will be somethings he just has to do whether he likes it or not.
This is a very real concern. This is one reason why gradeskips are so appealing. In a weird way, they allow a child to just 'blend in and be regular.' at least as much as possible. (Although full grade skips aren't for everyone.)
Things like spelling, you can have him take all whole year's words right now, and have him place out of spelling all together, same with Math. Reading, Science and History is more difficult - as they are so much about process. If they are taught independently, you could let him go through at a comfortable speed, and work on projects you design towards the end of the year. Or you could find some curriculum that reflects his interests and ability and put that into his folder, and give up on getting rid of the time wasters. Depends on the kid.
