Magic Doors is designed to address the skills of pattern recognition, multiplication patterns and mental math in a unique and interesting way. Students try and guess the number of items behind the doors in as few guesses as possible. In the full version of the activity there are 3 levels of difficulty and a huge pool of possible pictures.
"This is some of the BEST software I have used to support my math curriculum." ... S. Sandell, Highlands Elementary, San Mateo, CA