1. Outcomes of patterns of classroom verbal and non-verbal behaviour of some selected secondary school chemistry teachers;Aboaba,1984
2. The language of the classroom;Bellack,1963
3. Taxonomy of educational objectives handbook 1: Cognitive domain,1956
4. Teacher Influence, Pupil Attitudes and Achievement;Flanders,1956
5. The development of an observation instrument for science teaching;Fleschler;Journal of Research in Science Teaching,1967