Aya Itoi, Yosuke Yamada, Satoshi Nakae, Misaka Kimura
Decline in objective physical activity over a 10-year period in a Japanese elementary school
Journal of physiological anthropology
extent students benefit highachieving peers tracking help strong students hurt weak ones however students may benefit tracking allows teachers better tailor instruction level lowerachieving pupils particularly likely benefit tracking teachers incentives teach top distribution propose simple model nesting effects test implications randomized tracking experiment conducted 121 primary schools kenya direct effect highachieving peers positive tracking benefited lowerachieving pupils indirectly allowing teachers teach level jel i21 j45 o15