Grouping students by ability, or what was traditionally called tracking, fell out of favor a decade ago but is making a comeback. What's driving the resurgence? What’s the impact? What are the current pros and cons?

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Joann DiGennaro, President, Center for Excellence in Education and author ofm Science Literacy: Essential for Decision Making. Carol Burris is principal of South Side High School in the Rockville Centre School District in NY and co-author of Detracking for Excellence and Equity. Patrick Riccards, is a communications and policy expert and also blogs for Eduflack. Nancy Blair a professional development consultant, former teacher and school administrator.