TY - BOOK AU - Sharma, Ramesh Chander ED - Hooda, R.C. TI - Effect of four class room presentation modes on the achievement of secondary students in science U1 - TS.0865 PY - 1991/// PB - Maharshi Dayanand University KW - CLASSROOM MANAGEMENT KW - SCIENCE - STUDY AND TEACHING KW - EDUCATION, SECONDARY KW - EDUCATION - EXPERIMENTAL METHODS ER -