At the beginning of the year DD7 missed some questions on AR books that I thought were too far below her reading level. I told her part of the problem was she wasn't engaged in the books and I would have also missed the question about whether Clifford chased a ball, a butterfly or a cat.
I worked with the teacher to have DD take tests on books she was engaged with and were at her level. This helped her confidence and alleviated some of the unhealthy perfectionism that came out when she missed questions on books she knew were too easy for her.
If the teacher thinks the problem is he's not overly enthusiastic about what he's reading, I'd work to find books he IS enthusiastic about! I would expect that approach to have a better payoff than drawing pictures about books that don't engage him.
