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on redditThis subreddit is for discussion of mathematical links and questions.
on redditPost all of your math-learning resources here. Questions, no matter how basic, will be answered (to the best ability of the online subscribers).
MathOverflowMathOverflow is a question and answer site for professional mathematicians. Anybody can ask a question. Anybody can answer. The best answers are voted up and rise to the top.
Art of Problem SolvingArt of Problem Solving creates educational materials for motivated students in grades 2–12. The company's books, classes, and online resources help students become creative, successful problem solvers. The website contains a community forum that is available to all that have math questions.
on redditMath education! r/matheducation is focused on mathematics pedagogy (the teaching of). Please avoid posts that are related to homework or other "How do I solve this?" type questions. There should be an emphasis on usefulness (such as good internet resources or ideas for how to teach a concept).
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