Hone Your Study Skills: https://www.youtube.com/playlist?list=PLFo7hNhC0H_XCYL7Wgz6CZJkxhkjImVNh
r/IBO - You can ask questions or find resources to help you prepare for any IB paper (another word for exam).
r/APStudents - You can ask questions or find resources to help prepare for any AP exam.
YouTube - Bozeman Science - Various sciences including Physics, Chemistry, Biology, and Environmental Science.
YouTube - MIT OpenCourseWare - Amazing playlists for college level subjects (e.g. Quantum Physics)
YouTube - Khan Academy - Of course, the one and only.
YouTube - KNMath - This is a plug... also I'm trying to make physics videos. We'll see how it goes.
Physics Resources - Compiled resource list by bip.rilly@gmail.com for all AP Physics courses. There are also some FAQs at the bottom of the document.
Physics Notes by Topic - Google Drive of Notes based on my teachers' slides
BioNinja - Has content for IB Biology SL/HL and decent apps on both Android and iOS.
Youtube - Adam Norris - Has videos summarizing chapters for APUSH textbooks.
Khan Academy - You can't have a complete list without Khan Academy.
Group 4 Collaborative Google Doc - Copy of a collaborate Google Doc where people shared their resources for Group 4 Subjects
Biology thing: https://thesciencecodex.wordpress.com/ib-biology-notes/
Physics thing: https://ibphysics2016.wikispaces.com/Topic+1+%28Core%29
MCAT Thing: https://streamlinemcat-2f562.firebaseapp.com/
English Essay thing: http://www.ibsurvivors.com/new-blog/englishessay
MN Physics site: https://sites.google.com/a/mpsomaha.org/mnhs-physics/physics
Monocots vs Dicots: http://theseedsite.co.uk/monocot.html
Learning Programming (I think) https://github.com/duliodenis/cs193p-Winter-2017
Physics IA examples: http://sphsdevilphysics.weebly.com/internal-assessments---ib-physics.html
Physics: https://marshallhs.fcps.edu/sites/default/files/media/inline-files/IBPhysics2SummerAssignment.pdf
Some Scientific Study thing: https://www.sciencedaily.com/releases/2017/03/170323141414.htm
English Timed Writes: http://accounts.smccd.edu/skyenglish/11TimedWriting.pdf
Chess: https://www.youtube.com/watch?v=z66T9TyhWgA
Updated as of December 31st, 2018