Don't let your kids lose everything they learned during the school year during summer break. Keep their knowledge up to date with skills review tools. Mardel carries a wide array of skills review workbooks for kids from preschool through fourth grade. Skills review books keep kids up to date with the basics, including reading, phonics and arithmetic. Skills review books are a fun and practical way to review all those important skills and learned knowledge gained during the school year. Don't let your kids fall behind - choose skills review workbooks from Mardel.