RT Article T1 Student social class and teacher expectations: the self-fulfilling prophecy in ghetto education JF Harvard educational review VO 40 SP 411 OP 450 A1 Rist, Ray C. 1944- LA English YR 1970 UL https://krimdok.uni-tuebingen.de/Record/1642805106 K1 Selbsterfüllende Prophezeiung K1 Ghettobildung