The Illustrative Math Project gives illustrations of the new CCSS.  Many of the standards have nice, rich, high quality example problems.

Mathcounts is a math competition program with challenging problems and sometimes timely problems of the week.

The Math Forum and the Math Forum Newsletter – The Math Forum offers pd, answers to math questions, Problem of the Week sites and more. We also like their newsletter, which is like a newspaper of math and math ed.

Project Zero Thinking Routines has a lot of nice higher order thinking routines to help you get kids thinking and communicating in your classroom.

Math Tech:

Illuminations Math activities that focus on concepts and reasoning, some using technology.  Calculation Nation also resides here: the best math game website on the web.

Khan Academy Tons of helpful little videos on math algorithms.  Unfortunately, the site focuses more on math skills than concepts.    We do applaud the quantity of videos and we really like their coaching program which allows you to help mentor a student and monitor their progress.

Wolfram Alpha is more than a search engine. It gives you access to the world’s facts and data and calculates answers across a range of topics.

Shodor Applications, games, simulations and math tools.

Geogebra is a free web resource that can be used to replace Sketch Pad and a graphing calculator.  Plus your students can use it free from home as well.  Check out Geogebratube for great simulations and apps that have been made for you to use with your class as a demo or discovery tool.

The Teaching Channel has nice videos and lessons on all subjects.  The math lessons look good and tend to focus on concepts and reasoning.

Blogs are a great way to keep up on current trends in math, education, and ed tech.

Dan Meyer writes about the use of technology in the math classroom as well as writing and implementing tasks that help students to become patient problem solvers.

Great Maths Teaching Ideas is a math education blog that is full of current math ed news and great teaching ideas for various math concepts.  We believe that William’s philosophy matches up with the philosophy of the NCTM and CCSS.  Follow his blog for ideas and resources that you can put to use in your classroom.

The Innovative Educator is filled with ideas for the progressive educator, all subject areas, lots of tech ideas, and student centered learning.

Free Tech for Teachers is the blog for keeping up on new stuff in tech ed.

DeltaScape Nice blog about math ed and issues relating to teaching and learning.