Teaching the 7 Mathematical Processes -Edugains
Graham Fletcher -videos on all Mathematical Progressions
Concrete Representational Abstract (CRA) Approach overview and examples
Building Thinking Classrooms
Building Thinking Classrooms in Mathematics -video
Number Talks
What is a Number Talk - Jo Boaler
How to get started with Number Talks -example
More videos of Number Talks at different grade levels - Inside Mathematics website