You can use these posters to help your students find a "good-fit book" especially for the Daily 5 program you may have in your classroom. Even if you don't do the Daily 5 program, you can still use them to help with finding a book for you students to read at their level.
I give each student in my classroom a Daily 5 folder. Then, I have students glue these posters on to the front and back of the folder. This way any time a student looks for a book for his/her reading program(I use a BINGO Accelerated Reader program too.) s/he is reminded to find a "good-fit book".