Our upper grades (6-12) are trying to enforce a suggested reading list in which only books listed may be used for teaching in each grade. That means that 5th grade teachers couldn't use any books listed in the 6th - 12th grade list. I am looking for research-based info that shows it's good for students to read novels more than once and that learning will be even better at the upper levels if a child has already read a book. Knowledge gained over the years will lead to better and different understanding of literature. We all know it's a good practice to reread books at the beginning and emergent level, but I need proof it's also beneficial at the fluent level.