Sound Safari
Speech Sound Library
Every speech sound, by age
23 consonant and digraph sounds — when each one typically develops, what goes wrong, how to practice it, and the complete word list to work with. Built from McLeod & Crowe (2018) developmental norms and Sound Safari's clinical data.
Speech sound development chart
Each bar shows the window from 50% mastery to 90% mastery for that sound. Click any row to open its page.
Sound
2 yrs 4 yrs 6 yrs 8 yrs
By
/p/ Age 3 /b/ Age 3 /m/ Age 3 /n/ Age 3 /h/ Age 3 /w/ Age 3 /t/ Age 4 /d/ Age 4 /k/ Age 4 /g/ Age 4 /f/ Age 4 /y/ Age 5 /ng/ Age 4 /v/ Age 5 /s/ Age 6 /z/ Age 6 /sh/ Age 6 /ch/ Age 6 /j/ Age 6 /l/ Age 5 /r/ Age 7 /th/ Age 8 /th/ Age 8
Source: McLeod, S. & Crowe, K. (2018), AJSLP.
Browse by mastery age
Pick a sound to open its full guide — developmental norms, common challenges, how to practice, and the full word list by position.
Early-developing sounds
Most kids master these by age 4
Mid-developing sounds
Most kids master these by age 5
Late-developing sounds
Mastered by age 6 or later — common SLP targets
