Log Out
Welcome! Subscribe for 1/2 price ($30/year) with promo code "backtoschool"
Welcome to CTREX 5.0 [BETA]
Attributes by Math Doodles
© 2015 Carstens Studios

CTR Review
05/25/2015
Seven hand-illustrated, mind-bending math activities bring the essence of math problem solving to your multi-touch screen. This app represen...