Working Words in Spelling helps all students achieve spelling success--- Lessons begin with a pretest and proofreading activity to help students identify problem areas.- Students learn more than 4,000 high-frequency base words plus 13,000 related forms--99% of the most commonly used words in both student and adult writing. - Challenge words for every lesson motivate higher-ability students. - Writing activities help transfer accurate spelling to daily writing. - Yellow Pages are a handy spelling reference to help students improve their spelling.