Louis Manfra, University of Missouri (IMAGE) University of Missouri-Columbia Caption Manfra found that, among low-income children, those who could recite and count to 20 in preschool had the highest math scores in first grade. Credit University of Missouri Usage Restrictions Credit University of Missouri License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.