The file includes a guide to "Levels of Inquiry", which corresponds with Costa's levels of inquiry.
I find levels of questions to be a great consistent activity in my class, which encourages deeper-level thinking, discussion, and writing. Every student gets a copy of this chart at the beginning of the year and glues it into his/her writer's notebook. We use it all year to guide our analysis of everything we read.
(It seems like the thumbnails may be off, but the formatting in the real file is intact)