Minute Math Electronic Flash CardTM Build number fact fluency in just a minute! Familiar fact family triangle is now electronic. Practice operations (add/subtract or multiply/divide) and early algebraic skills (equations and commutative property). Offers 60-second timed mode; un-timed mode (low-pressure); and 3 levels of difficulty. Color-coded screen frames reinforce parts of the equation. Gives positive, corrective feedback (visual and auditory). Durable unit with volume control measures 5.5"H. Requires 3 AAA batteries, not included. For individual practice or two students taking turns. Grades 1 - 3.How to Play:? Choose an operation and level of difficulty? Watch the screens, then fill in the equation's missing number? Act fast! Tally as many correct answers as you can in 60 seconds