Global Grouping Theory (IMAGE) University of Rochester Caption Researchers from the University of Rochester and the University of Nevada have developed, for the first time, a mathematical approach to grouping theory. They compares different grouping methods and shows the best way to group individuals for teacher-led instruction. Credit University of Rochester illustration / Julia Joshpe Usage Restrictions None License Original 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.