looping
n.β Β«School administrators are likely to implement “looping” next year. Teachers would flip-flop grades so that one teacher would move up with youngsters while the other teacher moved down a grade.Β» βββLoopingβ Could Provide Pupils With More Continuity” by Meredith Carlson Hartford Courant (Conn.) Mar. 3, 1994. (source: Double-Tongued Dictionary)