Study after study finds that young readers select independent reading books that are harder than their «independent reading levels» (Donovan, et al., 2010). (shanahanonliteracy.com)
Alison Bliss also brought her class to the library to select independent reading books. (smore.com)
Another option is to have students look through the pages of their independent reading books and search for comparative and superlative adjectives. (thoughtco.com)