Brain breaks
Students guess a secret number and get clues like "higher" or "lower", or math clues like "it is a multiple of 4". Builds number sense in minutes.
Keep playing
Students walk around the room saying "mingle, mingle" until the teacher calls a number, then quickly form groups of exactly that size.
Read a statement.
A circle clapping game: students pass a clap around while chanting, and whoever is clapped on the final count is out.
The teacher picks a row of students as the "train", and each student answers in turn without a pause, like cars passing one after another.
Students count around the room but say "Buzz" instead of any multiple of a chosen number.
The class counts to 20 one voice at a time without planning who goes next.