Mastering the complexity of teaching takes time and requires a lot of practice and sustained effort. Observing and reflecting about actual lessons can play a critical role in the journey to becoming a proficient teacher. It provides a direct window into the classroom, from which practitioners can analyse and reflect about teaching in order to hone their craft.
L. Prieto, K. Sharma, Y. Wen, and P. Dillenbourg. Proceedings of the 11th International Conference on Computer-Supported Collaborative Learning (CSCL 2015), page 212-219. Gothenburg Sweden, (2015)