RT Article
T1 Shifting the bell curve: The benefits and costs of raising student achievement
JF Evaluation and program planning
VO 32
IS 1
SP 74
OP 82
A1 Yeh, Stuart S.
LA English
YR 2009
UL https://krimdok.uni-tuebingen.de/Record/1912702932
DO 10.1016/j.evalprogplan.2008.08.006