Use puppets to help kids practice sound substitution! I used this monster puppet to have my kids practice replacing every beginning sound with the /m/ sound, because Mr. Monster only says words that start with the letter M. So cookies is "mookies" and soda is "moda." The kids have to guess what the monster wants, and then try to make the monster talk as well!
Vocabulary 2 - When teaching students a new vocab word, get them involved and make sure they understand the concept by having them draw a corresponding picture on an index card. Then put the index cards on a poster with the word, definition and sentence to hang in the room for reference. Depending on the grade, the students can take turns doing the other parts of the poster themselves.