W.R.
Hi T.,
Reading comprehension is basically, "I understand what I just read." If he doesn't read fluently (speed and accuracy) or stumbles on words he doesn't know or understand, he will have to do the extra work of having a dictionary handy, and making notes about what he read. Perhaps draw pictures. If he has to answer questions at the end of a Ch. read the questions first, then he knows what to look for in the text. These strategies work, yet the student has to put the work in and be motivated.
As far as piano lessons go, Long Beach Parks and Rec. has group lessons for beginners at the tune of about $60 for 8 weeks. Also LBCC has beginning classes that I believe admit 16 year olds. Perhaps you have similar services in your area.
Good luck,
Wendy