3Blue1Brown, by Grant Sanderson, is some combination of math and entertainment, depending on your disposition. The goal is for explanations to be driven by animations and for difficult problems to be made simple with changes in perspective. 
3blue1brown 

youtube math scicomm 

long 
The parsed status is a little tongueincheek; I have not read the book cover to cover, but it is what I use for all my algorithms teaching, so I hope that counts! Absolute favorite ❤️ 
Algorithms by Jeff Erickson 

computerscience book 
pseudo 
long 
Valuable advice for apsiring academics by Shashank Srikant. 
Aspiring Academics 

advice article academics 
pseudo 
moderate 
Subscribe to see tutorialstyle videos about electronics, computer architecture, networking, and various other technical subjects. 
Ben Eater 

youtube scicomm 

long 
A regular series of seminars held via video meetings, open to anyone, and targeted to the interests of attendees of the COMSOC workshop series. 
COMSOC Video Seminar 

list computerscience 

long 
CS Unplugged is a collection of free teaching material that teaches Computer Science through engaging games and puzzles that use cards, string, crayons and lots of running around. 
CS Unplugged 

scicomm computerscience list 
pseudo 
long 
Led by Manish Jain at IIT Gandhinagar. STEM videos predominantly in Hindi and English. 
Center for Creative Learning 

youtube classroom scicomm 

long 
The next book from Ben Orlin, the popular math blogger and author of the underground bestseller Math With Bad Drawings.Change Is The Only Constant is an engaging and eloquent exploration of the intersection between calculus and daily life, complete with Orlin's sly humor and wonderfully bad drawings. 
Change Is the Only Constant 

scicomm math book 
pseudo 
long 
A ridiculous (and fun!) way to solve Rubik’s cubes and (not) solve equations. Recording of a talk given by Ramprasad Saptharishi. 
Commutators 

scicomm video computerscience 
pseudo 
moderate 
Opinions of Doron Zeilberger 
Dr. Z's Opinions 

opinions essays list 
pseudo 
long 
These essays have been a heavy early influence on how think about a lot of things. 
Essays and Opinions by Oded Goldreich 

opinions essays list 
pseudo 
long 

Essays by Matt Might 

list essays academia 
pseudo 
long 
For your discrete math class. 
Flawed proof example 

math tweet classroom 
parsed 
short 
Virtual lecture series in recent developments in parameterized complexity. 
Frontiers of Parameterized Complexity 

list computerscience 

long 

List of ACM Turing Award Lectures 

list computerscience 

long 
Looking Glass Universe is a channel mostly about the strange world of quantum mechanics. It's created by Mithuna Yoganathan, who did her PhD in quantum computing at the University of Cambridge. 
Looking Glass Universe 

youtube scicomm 

long 
A live survey of known lower bounds in arithmetic circuits by Ramprasad Saptharishi 
Lowerbounds Survey 

survey article computerscience 

long 
Bestselling author and worstdrawing artist Ben Orlin expands his oeuvre with this interactive collection of mathematical games. With 70plus games, each taking a minute to learn and a lifetime to master, this treasure trove will delight, educate, and entertain. 
Math Games with Bad Drawings 

scicomm math book 
pseudo 
long 
A hilarious reeducation in mathematicsfull of joy, jokes, and stick figuresthat sheds light on the countless practical and wonderful ways that math structures and shapes our world. By Ben Orlin. 
Math with Bad Drawings 

scicomm math book 
parsed 
long 
A book by Donald E. Knuth, Tracy L. Larrabee, and Paul M. Roberts 
Mathematical Writing 

advice writing book 
parsed 
long 
Free tools, courses and manipulatives to make online learning more interactive and engaging than ever before. 
Mathigon 

book math explorable 
pseudo 
long 
Cool physics and other sweet science. 
Minute Physics 

youtube scicomm 

long 
Videos about numbers and mathematics. Videos by Brady Haran since 2011. 
Numberphile 

youtube scicomm 

long 
By Nicky Case and Vi Hart. "... a story of how harmless choices can make a harmful world." 
Parable of the Polygons 

math explorable classroom 
parsed 
moderate 
Thoughts from Shriram Krishnamurthi 
Parenthetically Speaking 

opinions essays list 
pseudo 
long 
These are the lecture notes of the Aalto University course CSE4580 Programming Parallel Computers. Very comprehensive! 
Programming Parallel Computers 

course computerscience website 

long 
A free introduction to quantum computing and quantum mechanics by Andy Matuschak and Michael Nielsen. 
Quantum Country 

physics book 

long 
Seeing Theory was created by Daniel Kunin while an undergraduate at Brown University. The goal of this website is to make statistics more accessible through interactive visualizations (designed using Mike Bostock’s JavaScript library D3.js). 
Seeing Theory 

book computerscience explorable 
pseudo 
long 

Standup Maths 

youtube maths scicomm 

long 
Videos about science. 
Steve Mould 

youtube math scicomm 

long 
Tessellate is the annual college festival of Chennai Mathematical Institute (CMI). The Youtube channel has a bunch of really nice talks! 
Tessellate CMI 

scicomm youtube math 
pseudo 
long 
By Nicky Case. A remarkable explorable that demonstrates the iterated prisoners dilemma. 
The Evolution of Trust 

math explorable classroom 
parsed 
moderate 
By Nicky Case. An interactive about how things spread in networks. 
The Wisdom and/or Madness of Crowds 

math explorable classroom 
parsed 
moderate 
A lesson based on the windmill video. Neat problem and solution! 
The unexpectedly hard windmill question 

math explorable classroom 
parsed 
moderate 
By Nicky Case. An interactive (and really welldone) guide to alternative voting systems. 
To Build a Better Ballot 

math explorable classroom 
parsed 
moderate 
An element of truth  videos about science, education, and anything else I find interesting. 
Veritasium 

youtube scicomm 

long 
Visualising data structures and algorithms through animation. Conceptualised in 2011 by Dr Steven Halim as a tool to help his students better understand data structures and algorithms, by allowing them to learn the basics on their own and at their own pace. 
VisuAlgo 

course computerscience explorable 
pseudo 
long 
An explorable video series by Grant Sanderson and Ben Eater. Pushing the limits of WebGL! 
Visualizing Quaternions 

math explorable classroom 

moderate 

Welch Labs 

youtube maths scicomm 

long 

Wendover Productions 

youtube scicomm 

long 
Explorable from Minute Labs exploring the construct of a single day. 
What is a Day? 

physics explorable classroom 

moderate 