For example, as noted earlier, a central conceptual structure for number seems to emerge in a wide variety of cultures. Yet Robbie Case and his colleagues have found that some children perhaps because they’ve had little or no prior experience with numbers and counting begin school without a sufficiently developed conceptual structure for number to enable normal progress in a typical mathematics curriculum. Explicit instruction in such activities as counting, connecting specific number words (e.g.,”three,” “five”) with specific quantities of objects, and making judgments about relative number (e.g.,”Since this set […] has more than this set [..], we can say that “three” has more than “two”) leads to improved performance not only in these tasks but in other quantitative tasks as well(Case & Okamoto.1996; S.A.Griffin et al.,1995).