I've recently started doing Speech Centers/Speech Stations for my articulation and phonology students. One station we use is a Listening Station. The kids listen to models of words and then repeat them. Included in this PPT are 27 S Blend pictures including SK, ST, SW, SP, SM, and SN. Each picture models the word 3 times. The first two times, the word is segmented (e.g. Sssss (pause) nake). The last time, the word is said naturally. After each model, there is a long pause so that the student has time to repeat it. I love (and so does my administrator!) that the kids can get independent practice with models of correct production. Try it!
If you like this, check out my other individual PPTs and a bundle of all my PPTs!
http://www.teacherspayteachers.com/Product/Bundle-of-Articulation-PowerPoints-with-Audio-1476748 (BUNDLE & SAVE!)