Filling the knowledge gap in the limited research on professional development leaders is an urgent issue if teacher learning is to be improved. This research and development project is studying how leaders learn to cultivate mathematically rich professional development environments. The authors adapted two frameworks from classroom-based…

The three objectives of this study were: (1) To investigate the changes in different teaching behaviors effected by different instructions alone, training alone and the interaction between them when they are combined; (2) To reveal the structure of interrelations among classroom activities, classified according to two category observation systems,…