[Pillsbury]

I only have a small blurb for this based on everything above.
If he is a busy man with employees, he probably reads the news-paper or important journals and such for business. Get the equivilant material, or tell him to get the equivilant material in English if possible. There will probably be English editions of his mother tongue newspapers available etc.
Also, (I`m not sure if he already does this) but if he is assigned reading for outside of class, remind him to read out loud to himself. The point is to get him using his English as much as possible when not in class.
I`m not sure of the nationality, but as others have said, he will have interests, perhaps hobbies. If he does then he should get online and research those interests and hobbies in English. Downloading or printing pages here and there and reading them.
As others have said, he most likely commutes. If it isn`t by car, he can read. He could also read during a snack break or day meal if it isn`t a meeting.