Language:Chinese.Paperback. Pub Date: 06 May 2009 Pages: 80 Publisher: Kumon Publishing North America of Most GRADE-school the Workbooks the try to cover the full RANGE of TOPICS in one workbook. And AS a result DO Not Dedicate enough pages to important mathematical concepts. Kumon's research has found. however. that children find learning easier when they tackle one skill set at a time. With these findings in mind. we designed our newest line of workbooks to help children with one particular mathematical skill set per book.