This study examined a critical learning outcome of behavioral fluency, "application." Application refers to the combination of two or more behaviors that form a composite or compound behavior. Three students with specific learning disabilities in reading learned two behaviors, how to write a set of letter sounds they heard and orally segment words into their constituent letter-sound correspondences. The procedures involved providing instruction and practice to a fluency criterion for both letter sound writing and segmenting words into sounds. Results showed that all three students applied the two element behaviors to a non-instructed compound behavior of spelling real and nonsense words. (Contains 1 table and 3 figures.)