Hi -
Do you have any space in your yard where you could make a small coop and enclosed run for your little chick? As it grows, it will need room to roam and peck and scratch in order to really be healthy, both physically and emotionally. I agree with the others as well that you may want to consider getting a buddy. Chickens are naturally social critters, and your little guy is probably lonely. I'll bet he can't wait for you to get home from school to play with him!
Are you feeeding your chick food that is specially formulated for growing chicks? I would reccommend that as well. His food needs will change as he gets older according to his breed, and what you intend to do with him (pet, show bird, breeder, etc.). Also, one of the posts mentioned something about eating cockroaches - just a warning: if you are spraying or using pesticides in your home, chickens can easily die from eating poisoned bugs. My friend's sister lost her favorite Buff Orpie rooster that way.
Have fun!