오五五는 십이 아니다; 곱셈을 쉽게

I bought this for my 9-year-old who still counted on her fingers. The strategy-based approach finally made the facts stick — she stopped guessing and started actually recalling them. Wish we'd found it sooner.

I tutor a 4th grader who still counts on his fingers, and the strategy-based approach here finally made the facts click instead of just drilling flash cards. The section on fives was a lightbulb moment for him.

My daughter was still counting on her fingers in fifth grade, and the trick of breaking each fact into a smaller one she already knew clicked almost overnight. The pages are short enough that she does one or two without a fight, which honestly never happens with math.