The effects of mastery learning on the achievement of heterogeneously grouped ninth grade physical science students at the John H. Woodson Junior High School   Creator:   Pemberton, Laughton Publication Date:   1990 Type:   Book Format:   iii, 35 leaves : ill. ; 29 cm. Source Institution:   University of the Virgin Islands Holding Location:   University of the Virgin Islands Subject Keyword:   Physical education and training -- Study and teaching. Education -- Experimental methods. Language:   English The effects of mastery learning on the achievement of heterogeneously grouped ninth grade physical science students at the John H. Woodson Junior High School