TheHappyTeacher: BRAIN BREAKS! For my secondary kids, I'd probably write things like "touch three walls", "walk a lap", etc. Then they would have a kinesthetic element to the traditional Think-Pair-Share.
Giant Connect Four! Take a shower curtain, spray paint it yellow and leave "holes" for the game pieces. Grab some plastic plates from the dollar tree and throw on Velcro on the back of the plates and where the holes are, then use Velcro to hang it from the wall each time you want to play. Kids loved it!