Interesting story in the NY Times yesterday: http://www.nytimes.com/2013/06/10/education/grouping-students-by-ability-regains-favor-with-educators.html?hp&_r=0 
Classrooms all over the country are returning to grouping students based on ability. Proponents say that that grouping students by ability helps educators cope with a wide variety of ability levels and achievement while opponents say it traps poor and minority students in low-level groups.
What do you think about ability grouping? Do you think it's a beneficial practice?