Addition Facts will become second nature with Japan Math Addition Facts Mastery. We make learning addition facts effective with our systematic and accessible approach for teaching children basic addition math facts. This book is recommended for both parents and teachers of elementary age children. This book, along with the Japan Math program, helps students gain Japan Math Mastery of knowing their core math facts fluently and with notable speed. The book includes over 20 Japan Math addition fact quizzes along, corresponding answer keys, and a recording sheet for charting individual progress. All timed math fact quizzes are black line masters ready for parent or teacher reproduction.