1. Bakker, A., Derry, J., & Konold, C. (2006). Using technology to support diagrammatic reasoning about center and variation. Paper presented at the seventh international conference on teaching statistics, Salvador, Bahia, Brazil.
2. Bannan-Ritland, B. (2003). The role of design in research: The integrative learning design framework. Educational Researcher, 32(1), 21–24.
3. Bassett, D. R., & Strath, S. J. (2002). Use of pedometers to assess physical activity. In G. J. Welk (Ed.), Physical activity assessments for health-related research (pp. 163–177). Champaign, IL: Human Kinetics Publishers.
4. Borgman, C. L., Abelson, H., Dirks, L., Johnson, R., Koedinger, K. R., Linn, M. C., et al. (2008). Fostering learning in the networked world: The cyberlearning opportunity and challenge. Retrieved January 10, 2010, from http://www.nsf.gov/pubs/2008/nsf08204/nsf08204.pdf .
5. Bravata, D. M., Smith-Spangler, C., Sundaram, V., Gienger, A. L., Lin, N., Lewis, R., et al. (2007). Using pedometers to increase physical activity and improve health. Journal of the American Medical Association, 228(19), 2296–2304.