Whole Class Game... Great for Warm ups, review before tests, or even a team building activity!
This game helps children grow tremendously with their mental math skills! This is also a great informal assessment for teachers to see which children are struggling with these mental math skills and which children are excelling and need more of a challenge!
I also have an "I have, who has game" where the children read the written notation for the numbers "for ex: twenty two".
My class loves this game... ENJOY :)