This reddit is intended for academic philosophers - (graduate) students, teachers, and researchers. Encouraged submissions: Open access articles of merit and substance, including from the popular press, that directly engage with a philosophical issue or concern the philosophical academic community. Links to teaching resources also appreciated.
Math education! Anything math related that is useful for education, teachers, or students. There should be an emphasis on usefulness (such as good internet resources or ideas for how to teach a concept). Note: This is not a subreddit to publicize each post in your (or any single) blog or website, but rather to point out resources you've found that you could actually see bringing something useful to a math class.
Cryptography is the art of creating mathematical assurances for who can do what with data, including but not limited the classical example of encrypting messages so that only the key-holder can read it. Cryptography lives at an intersection of math, programming, and computer science. This subreddit covers the theory and practice of modern and *strong* cryptography, and it is a technical subreddit focused on the algorithms and implementations of cryptography.
The aim of /r/Physics is to build a subreddit frequented by physicists, scientists, and those with a passion for physics. Papers from physics journals (free or otherwise) are encouraged. Posts should be pertinent, meme-free, and generate a discussion about physics. Please report trolls and intentionally misleading comments.