34 pages of Articulation Mouths, 17 coloring pages and 17 matching, colored posters, for r, s, t, th, f, v, b, m, n, ng, l, g, k, sh, ch, and p!
If applicable, each colored poster background color matches an error pair. For example, s and t poster background match due to articulation similarities. Same with ch and sh. But, s and th do not match, since the articulation of the tongue, teeth and lips do not match. The lips, tongue and teeth are all the same colors across each poster. Other mouth parts are left blank, so the focus is on the articulators. Air flow is also shown, as a short burst/puff, long "hiss," or "low soft fog," etc., (in terms of plosives, fricatives, etc).
When just beginning therapy, have your student color the mouth of their target sound, as well as their error sound, to emphasize the difference in articulation, as you model and explain the air flow patterns.
The posters are great for having hung up to easily point to the specific mouth your particular student is working on.
I always had folders with copies of these for each student that began speech throughout the school year.