Science

10 Women in Science and Tech
Astronomy for youth
Astronomical Society of the Pacific
Battery University
Biotechnology
Carnegie Institution for Science
Dynamic Periodic Table
Ecology Garden in a bottle
Einstein for Everyone
How elements form
Human Microbiome
Interactive Periodic Table
GOOGLE Interactive - 3D Periodic Table 
Interesting Facts about the Planets
Learn Genetics Cell size and scale
Mercury is the closest planet? 
NASA For Kids
NGSS Phenomenon
Periodic Table
Physics
Powers of Ten – The size of the Universe
Scale of the universe
Space Facts for Kids 
The Anthropocene
The Milky Way Galaxy
What are genome editing and CRISPR-Cas9? 
What is Crispr Gene Editing?
What is CRISPR-Cas9? 


Technology

A Beginner's Guide to Neural Networks and Deep Learning
AI The Road to Superintelligence
Analog computation, Part 1: What and why
Coding instructions
Computer Networks
Earth & Space Science Resources
Google Deep mind
How Frightened Should We Be of A.I.?
Hubble Space Telescope Video
Learn Computer Science
Nanotechnology
Neil deGrasse Tyson Video Game
Python Code Academy
Smithsonian Learning Lab
Special Report: 50 Years of Moore's Law 
Steam, The Ultimate Online Game Platform
Technology | NASA
Technology Student Association
The Artificial Intelligence Wiki
The Technology Policy Institute


Engineering

Chemical Engineering
Civil Engineering Classes (low cost)
Classes Women in STEM what it takes
Mechanical Engineering
Microelectronic Engineering 
Robotics
Student Engineering
Try Engineering
Waste and Recycling
Women in STEM


Mathematics

Discover Learning
Fun with Probability
Imperial vs. Metric System
Kahn Academy
Learn Cryptography 
Math Games and Quizzes
Math Shortcuts videos
Mathigon classes
MIT MOOC Classes
Personalized Learning for Students
Python for Finance (Book)
Quant Finance
SI Units | NIST
SIAM K-12
Trigonometry
Wall Street Fun with Math
Wall Street Quants
What is Cryptocurrency