When teaching TEFL (teaching english as a foreign language) I feel it is great whenever I can use some time to exercise vocab. I write the alphabet on the board and then I say I am going on a road trip. (It's actually a classic game to play with any grade) I say "I'm going on a road trip and I'm taking along my..." (something that stars with A) the next person repeats what the first person said then adds on something that begins with B. And so on. If this takes up too much time then just write on the board only VOWELS or somebody's full name. It is a good vocab builder and memory game! You can also choose a specific theme like only animals, famous people (First or last names, it doesn't matter) or things that are green.