Added Jan 2014
iPad apps for school – blog by Richard Byrne
Free technology for teachers – blog by Richard Byrne
Android 4 schools – blog by Richard Byrne

Would you rather? - presents a picture with a mathematics problem that asks "would you rather?"
How does Wolfram Alpha work? – video (post)
Mathematics, learning and Web 2.0 – math blog
Thinking blocks – elem and middle school (post) - interactive templates in which students use brightly colored blocks to model and solve problems
10 resources for middle and high school math teachers (post)
NRICH – math lessons (post)

Added December 2013
Science of NFL Football – from NBC Learn (post)
MathDisk – create interactive worksheets (post)
Math of the Horizon (post)
Economics lessons for students of all ages (post)

Added November 2013
Figure This - math challenges for Families (post)
Space Math - math lessons from NASA (post)
Curriki presents 6 PBL Geometry projects (post)
Math practice in 13 languages (post)
Math Shorts from Planet Nutshell (post) currently elementary and middle
Math@Work – video series from Scholastic (post)

Added October 2013
Math Duel - iPad app - two students compete on one iPad (post)
ten good iPad apps for elementary school math practice (post)
Loot Pursuit - free math game for middle school students (post)
five mathematics glossaries for kids - grade K-12 (post)
Math Live - animated math lessons for kids - elem and middle (post) - from Alberta
Math Frame - 17-+ free math games - elementary (post) - from UK
IXL Math Practice - free iPad app K-6 (post)

Added September 2013
Common Core Math: high school - from edutopia (post)
Common Core Math: middle school - from edutopia (post)
Coral Reef Fish Survey Simulation from NatGeo (post) - uses estimation
TenMarks - 20,000+ math problems aligned to Common Core (post) - elementary and middle school
Mathispower4u - 3000+ free mini-lessons with no ads

Added Summer 2013
Bedtime Math - free daily math problems for all ages
Math Chimp - games, videos and worksheets (1st-8th)-website and app
Google Earth and Map lessons
ULearniversity - online math lessons and practice activities
+plus magazine - free online publication - practical applications of math
Jefferson Lab - math and science puzzles, videos, games - teacher resources page
Math Champ Challenge - iPad app for 4th-7th - aligned to Common Core
Maths Week - from New Zealand
McGraw Hill's eGlossary - a math glossary (post)
Do-it-Yourself GIS - free resources for creating data maps
Virtual Nerd - videos for math grades 6-8, pre-algebra, algebra 1 and 2 and geometry. From Pearson
Innovation Math Challenge - from WGBH - deadline 11/22/2013
a challenge for educators, student teams, gamers, programmers, and anyone who has a great idea to create fun and engaging math educational media

Added May 2013
Clinometer app
SOS Math free math review - Algebra to Differential Equations
Oxford University Math OpenCourseWare

Added April 2013
Core Math Tools (from NCTM)
10 good video sources for math students and teachers
Put a scientific calculator on your blog
Math is Power 4 U - tutorial videos
How is math beautiful

Added March 2013
Math Trail (map based math games)

Added February 2013
Opus-Free math problem word bank aligned to CC: blog post-
Math Worksheets (lower level)
CK-12 Free resources (including textbooks)
Properties of Rational Numbers example
AIM Open Textbook Initiative

Added January 2013
How does math guide our ships at sea? (video)
Math in Careers Database -
Pizza physics -
Good Math Feeds for teachers -

Added December 2012
Wolfram Math
Wolfram examples by topic
Wolfram math examples
Wolfram statistics and data analysis examples
Wolfram units and measures examples
Wolfram money and finance examples
Wolfram: The Math Behind Numbers
Wolfram Mathematica
Wolfram Mathematica Online Integrator
Wolfram Functions
Math in Careers database
Math links

Lesson plans look for math section
Many SAT test prep links