Shell, D. F., Husman, J. E., Cliffel, D., Nath, I., Sweany, N., & Turner, J. (1997). Project CIRCLE: Second year evaluation report (Grant #R215D30195). Washington, DC: U.S. Department of Education: Secretary’s Fund for Innovation in Education and The University of Texas, College of Education, Learning Technology Center.
Shell, D. F., Husman, J. E., Droesch, D. M., Nath, I., Wall, N., & Turner, J. (1995). Project CIRCLE: First year evaluation report (Grant #R215D30195). Washington, DC: U.S. Department of Education: Secretary’s Fund for Innovation in Education and University of Texas, College of Education, Learning Technology Center.
Shell, D. F., Husman, J., Turner, J. E., Cliffel, D. M., Nath, I., & Sweany, N. (2005). The impact of computer supported collaborative learning communities on high school students’ knowledge building, strategic learning, and perceptions of the classroom. Journal of Educational Computing Research, 33(3), 327–349.
Informal Collaborative Learning Practice