My ds was just so easily distracted. He also has a sister that taught herself to read at age 4, so he'd just let her tell him what the words were!
I had to seperate them and keep him in a room with nothing to distract him at all.
Allowing him time to learn and not feel like he wasn't as smart as she was. (He is! He just didn't feel like he was able to compete.)
Also, I read aloud to my dc every single day at lunch time. Every day. We'd go through chapter books above their reading level. I can't tell you how many books we went through that way, I'd read until I was hoarse!
lol!
Then I'd also have a reading time every afternoon. Everyone had to sit quietly and read anything of their choice for 30 minutes a day. I'd set out a large variety and they could choose anything... Ranger Rick magazines, Bob books, Dr. Seuss, you name it.
I kind of miss those days now!!