Yes, EPGY does instruct. They have short "lectures", and they also have smaller reminder-type instruction during the problems. Child can repeat lectures whenever they want.
I do recommend that you sign up for the open enrollment option, which is MUCH cheaper. It doesn't include a tutor that you can call, but its not like your son will be able to talk to a tutor during class anyway. There is a thread somewhere on this forum where someone offered to be an administrator, which you need to sign up for the open enrollment option.
