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Lee, C., Ng., N. & Phang, R. (1999) A school-based study of cooperative learning and its effects on social studies achievement, attitude towards the subject and classroom climate in four social studies classrooms. Paper presented at the annual meeting of the American Educational Research Association, Montreal, Canada, April.

Lonning, R. (1993) Effect of cooperative learning strategies on student verbal interactions and achievement during conceptual change instruction in 10thgrade general science.Journal of Research in Science Teaching, 30, 1087-1101.

Madden, N., Slavin, R. Karweit, N., Dolan, L. & Wasik, B. (1993) Success for all: Longitudinal effects of a restructuring program for inner-city elementary schools. American Journal of Educational Research, 30, 123-148.

Matthews, M. (1992)Gifted students talk about cooperative learning. Educational Leadership , 50, 48-50. Ng, M. & Lee, C. (1999) The effects of cooperative learning on the cross-ethnic friendship choices of children. Paper presented at the annual meeting of the American Educational Research Association, Montreal, Canada, April. Nichols, J. & Miller, R. (1994) Cooperative learning and student motivation. Contemporary Educational Psychology, 19, 167-178.

Ramsay, S. & Richards, H. (1997) Cooperative learning environments: Effects on academic attitudes of gifted students. Gifted Child Quarterly, 41, 160-168. Ross, J. (1994) The impact of an in-service to produce cooperative learning on the stability of teacher efficacy. Teaching and Teacher Education, 10, 381-394. Slavin, R., Madden, N., Dolan, L. & Wasik, B. (1996) Every child, every school: Success for all. Thousand Oaks, CA: (Sage) Corwin Press.

Shachar, H. (1997) Effects of a school change project on teachers' satisfaction with their work, and their perceptions of teaching difficulties. Teaching and Teacher Education,13, 799-813.

Shachar, H. & Sharan, S. (1994) Talking, relating, and achieving: Effects of cooperative learning and whole-class instruction. Cognition and Instruction,12, 313-353.

Shachar, H. & Shmuelevitz, H. (1997) Implementing cooperative learning, teacher collaboration and teachers' sense of efficacy in heterogeneous junior high schools. Contemporary Educational Psychology,22, 53-72.

Sharan, S. (Ed.) (1994) Handbook of cooperative learning methods . Westport, CT: Greenwood Publishing Group. (2nd paperback edition, 1999: Praeger.)

Sharan, S. & Hertz-Lazarowitz, R. (1982) Effects of an instructional change program on teachers' behavior, attitudes and perceptions. Journal of Applied Behavioral Science, 18, 185-201.