Book Retriever - This app allows you to scan, level and inventory your entire classroom library. Leveling choices include Guided Reading Levels, Lexile, Accelerated Reader, Reading Counts, DRA and Reading Recovery.
A district form that I typed up and color-coded (we use Fountas and Pinnell guided reading levels). It's a really important resource, as I have ELL students reading from a pre-K level all the way to a 5th grade reading level. I've used this chart for years and it really helps!