I created this sort to have the students practice identifying the suffixes -er and -est in words. The students' directions are to underline the base word and circle the -er or -est, then cut and sort the words into the correct category. I thought this would be great practice for reading the words that contain suffixes, and with underlining the base words. Great for any spelling program that works on suffixes! Also check out my MANY other vowel team, r-controlled vowels, and suffix sorts, as well as my unit word searches and word searches! Enjoy!