Shih, T., & Lai, C. (2008). A study of the project-based learning on force and motion of the 5th graders. The proceedings of 2008
Taiwan Education Research, vol. 2, 551-562.
Thomas, W. R., & Macgregor, S. K. (2005). Online project-based learning: How collaborative strategies and problem solving
processes impact performance. Journal of Interactive Learning Research, 16(1), 83-107.