Visible Thinking - Harvard U - Link
This site provides a convenient way to learn about Visible Thinking as well as thorough descriptions of the ideals, routines and activities that we've developed from research in K-12 schools.Math Wire.com - Link
Mathwire.com is designed to provide activities and appropriate worksheets for teachers to use in their classrooms. All activities and worksheets support the constructivist approach to learning mathematics and the NCTM Standards.
Australian Association of Mathematics Teachers - Link
This book provides a developmental framework for counting strategies that has been identified through extensive research in Australian classrooms (used in SENA)
Developing Efficient Numeracy Strategies Stage 2 - Link
Each activity in this book is set out to explicitly highlight the questions of what the students currently know, what is the next step ... (used in SENA)
12 Of The Best Math iPad Apps Of 2012 - Link