PT - JOURNAL ARTICLE AU - Duckworth, Eleanor TI - ". . . What teachers know: the best knowledge base . . ." AID - 10.17763/haer.54.1.241hx178q48t5777 DP - 1984 Apr 01 TA - Harvard Educational Review PG - 15--21 VI - 54 IP - 1 4099 - http://harvardeducationalreview.org/content/54/1/15.short 4100 - http://harvardeducationalreview.org/content/54/1/15.full SO - herp1984 Apr 01; 54