1. Mergel, B (1998). Instructional design & learning theories. http://www.usask.ca/education/coursework/802papers/mergel/brenda.htm
2. Mayer, E. R. (2003). The promise of multimedia learning: using the same instructional design methods across different media. Learning & Instruction, 13, 125-139.
3. Savery, J. R., & Duffy, T. M. (1995). Problem based learning: an instructional model and its constructivist framework. Educational Technology, 35(5), 31-38.
4. Jonassen, H. D. (2006). On the role of concepts in learning and instructional design. ETR&D, 54(2), 177-196.
5. Churchill, D. (2007). Web 2.0 and possibilities for educational applications. Educational Technology, 47(2), 24-29.
6. Other online resources please refer to the related links of different items