For those of you who may have missed an EDge21 featured post or who didn't have the opportunity to look at some of them during this past week, here's a second chance.
Established in 1950, the Association of Teachers of Mathematics strives to encourage the development of mathematics education that it is more closely related to the needs of the learner.
Making the Modern World delivers powerful stories about science and invention from the 18th century to today to explain the development and spread of modern industrial society and all its effects on the lives of people.
Created in 2006, the goal of theNational Centre for Excellence in the Teaching of Mathematics (NCETM) is to ensure all teachers of mathematics have access to high quality continuing professional development.
Math for Morons Like Us is a site created by students for students. You'll find tutorials, sample problems, and quizzes, even a place to submit questions. A formula database gives quick access and explanations to all those tricky formulas.