3Carl Bereiter & Marlene Scardamalia(2000). Process and Product in Problem - Based Learning (PBL) Rearch.In C. E. Hmelo, & D. H. Evensen (Eds.), Problem-Based Learning: A Research Perspective on Learning Interactions. Mahwah, N J: Lawrence Erlbaum Associates,Inc. 185 - 195.
4Antonietti, A. (2001). Problem - based Learning, - A Research Perspective on Learning Interactions. The British Journal of Educational Psychology, 71 (2), 344 - 345.
5Schmidt, H. G., & Moust, H. C.(2000). Factors Affecting Small - Group Tutorial Learning A Review of Research. In C. E. Hmelo, & D. H. Evensen (Eds.), Problem- Based Learning: A Research Perspective on Learning Interactions. Mahwah, N J: Lawrence Erlbaum Associates, Inc. 19 -52.
6Woods, D. (2000) Problem - based Learning,Especially in the Context of Large Classes. Available:http: / / chemeng, mcmaster, ca / pbl / pbl. htm/. 2002 -10 -6.
7Hmelo, C. E., & Evensen, D. H. (2000). Problem -Based Learning: Gaining Insights on Learning Interactions Through Multiple Methods of Inquiry. In C. E. Hmelo, &D. H. Evensen (Eds.), Problem - Based Learning: A Research Perspective on Learning Interactions. Mahwah, NJ:Lawrence Erlbaum Associates, Inc. 1 - 16.
8Diffily, D. (2002). Project -based Learning: Meeting Social Studies Standards and Needs of Gifted Learners.Gifted Child Today, 25 (3), 40- 43.
9Solomon, G. (2003). Project - based Learning: A Primer.Technology & Learning, 23(6), 20 - 28.
10Dunaway, D. (2002). Sold On Problem - Based Learning (PBL). PBL Insight. 5(2). Available: http://www.samford, edu/pbl/PBLInsight/. 2002 - 10 -6.
