"Our main goal is to inspire, educate and empower teachers of mathematics, transforming the latest research on math learning into accessible and practical forms."

"Development and Research in Early Mathematics Education (DREME) brings together scholars and researchers from a variety of disciplines in a collaborative effort to promote young children’s early math development. Based at Stanford University, the initiative focuses on math from birth through age 8, with an emphasis on the preschool years."

"The Mathematical Association of America is the world’s largest community of mathematicians, students, and enthusiasts. We further the understanding of our world through mathematics because mathematics drives society and shapes our lives."

"Multimedia resources for K-12 classroom instruction and teacher professional development"

"The Trends in International Mathematics and Science Study (TIMSS) provides reliable and timely data on the mathematics and science achievement of U.S. students compared to that of students in other countries."

"Founded in 1920, the National Council of Teachers of Mathematics (NCTM) is the world's largest mathematics education organization."

"Founded in 2002 by Nobel Laureate Carl Wieman, the PhET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations. PhET sims are based on extensive education research and engage students through an intuitive, game-like environment where students learn through exploration and discovery."

"Purplemath's algebra lessons are informal in their tone, and are written with the struggling student in mind."