1. Learning Progressions in Science
2. Ball, D. L. & Cohen, D. K. (1999). Developing practice, developing practitioners. In L. Darling-Hammond & G. Sykes (Eds.), Teaching as the learning profession: Handbook of policy and practice (pp. 3–32). San Francisco, CA: Jossey-Bass.
3. Bolam, R., McMahon, A., Stoll, L., Thomas, S. & Wallace, M. (2005). Creating and sustaining professional learning communities (Research Report No. 637). London, UK: General Teaching Council for England, Department for Education and Skills.