Here is a list of my favorite resources for either learning math or math education.
The Girl With The Math Tattoo YouTube Channel
A youtube channel dedicated to teaching high school and early college level mathematics.
Khan Academy
For the independent math learner who wants extra practice. Teachers use these videos and practice problems in a pinch.
Desmos
Desmos is a graphing calculator that can do just about anything you can think of. Teachers this is a dynamite place to make interactive activities.
Deltamath
Deltamath is for pre-algebra up to calculus I. There are over 1000 practice problems and instructional videos.
Fun Brain
Find math games by topic or by grade. This is great for elementary age students.
IXL
IXL is an interactive math practice site. Students can freely practice by grade level, standard or skill. Students pre-k to 12th grade can find skills to master.
Math TV
Over 10,000 free math instructional videos from basic math to calculus.
Kuta Software
A worksheet generator with answer key to work on any math skill. Teachers use this to generate quick practice problems.
Aplusmath
Interactive math resources for teachers, parents, and students featuring free math worksheets, math games, math flashcards, and more.
Guide for Women in Mathematics
This article examines the history of women in mathematics, with a deeper look at the obstacles that women have faced in the field over the centuries, as well as the progress that’s been made toward gender equity. It also explores the wealth of scholarship and career opportunities available to women in mathematics.
Illustrated mathematics dictionary
Easy-to-understand definitions, with illustrations and links to further reading.
Math Planet
Math planet is an online resource where one can study math for free. Take their high school math courses in Pre-algebra, Algebra 1, Algebra 2 and Geometry. They have also prepared practice tests for the SAT and ACT.