This set of 55 red wooden counters is the quantity used for the classic Odd and Even work in the 3–6 mathematics sequence, where children lay out counters beneath numerals 1 through 10 in paired rows to discover the concept of odd and even. The deep red color provides clear visual contrast against a light work mat and maintains consistency with the traditional material. Keeping a dedicated, complete set on hand ensures the activity is always shelf-ready without borrowing from other math materials.