Sentence Writing - Expanding, adding who, what, when, where, why... I can't tell you how often this is useful to use for student (even in highschool) with ADHD
A quick youtube video is a great starter to a new theme or to recall something that was seen in a previous class. Use quiet tube to get rid of the side videos and the publicity.
Dice games: (the number on the dice) thing (s) you like to do on (sunny) days
For and against: some students talk the pros of things and some other about cons of things. Then they reverse!
"Toss and Talk Ball" can be used to start conversations. Just wondering how the topic is chosen...
This man here is Socrates and the warm up is called Socratic Answers. A letter is picked and students have to answer all questions with that letter. Let's say it is letter C. What's you name? Carlos. Where are you from? Colombia. What do you do? Carpenter. What's your favorite food? Cranberry pie. Students can also have sentences starting with a word with the letter.
Sticker on forehead with a word, question, command, etc. Students interact and they have to discover what they have on their sticker.
Offer some scrambled easy words from the last class for students to put in order. These can also be mimed!