Articulation I: Consonant Phonemes—Single phonemes grouped into voiced/voiceless pairs
Articulation II: Consonant Clusters—Words with a consonant combination
Articulation III: Vowels + R and R Clusters—Intensive practice with the letter r
Articulation IV: R, S, L, Th—Practice the four most common articulation targets
There is growing evidence that training more complex structures results in generalization and extension to non-treated sounds (Thompson, 2007). Therefore, careful selection of target sounds can reduce length of treatment time. The most efficient treatment appears to involve teaching sounds or sound pairs that are not in a childs pre-treatment repertoire. Of these, selecting developmentally later-acquired sounds that are also phonetically more complex, acoustically undifferentiated, and nonstimulable may enhance greater phonological change (Gierut, 2007).