# Butler, D., Lauscher, H., Jarvis-Selinger, S., & Beckingham, B. (2004). Collaboration and self-regulation in teachers’ professional development. ''Teaching and Teacher Education,'' 20(5), pp. 435–455. | # Butler, D., Lauscher, H., Jarvis-Selinger, S., & Beckingham, B. (2004). Collaboration and self-regulation in teachers’ professional development. ''Teaching and Teacher Education,'' 20(5), pp. 435–455. |