Wipe Clean Books: Simple Spelling and Simple Maths. Get your kids ready for school with Wipe Clean Simple Spelling and Simple Maths books. Both books come with a special wipe-clean pen—making practicing and mastering basic spelling and math skills fun and easy. Children can practice spelling and solving equations over and over again by simply wiping away the answers with a cloth—until they learn the basic concepts of numbers and words by heart.
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