Acapellascience:
https://www.youtube.com/user/acapellascience/

ScienceLife:
https://www.youtube.com/watch?v=-fk9tkDJ0Pk

Veritasium:
https://www.youtube.com/user/1veritasium

Mathologer:
https://www.youtube.com/watch?v=YuIIjLr6vUA

Physics Girl:
https://www.youtube.com/user/physicswoman

PBS Space Time:
https://www.youtube.com/channel/UC7_gcs09iThXybpVgjHZ_7g

Physics Tutorials:
https://www.physicsclassroom.com/Physics-Tutorial

Fermilab videos: 
https://tinyurl.com/drdonvideo

20 best science podcasts: https://www.geekwrapped.com/posts/the-20-best-science-podcasts

APS Physics Central:
Physics in Action, Physics in Pictures, Physics +, Physics@Home, and more
http://www.physicscentral.com

OSA’s Optics for Kids website:
Activities, Celebrities, Timelines, and more
http://www.optics4kids.org/home/

IOP Physics.org:
http://www.physics.org

NASA Outreach Resources:
http://science.nasa.gov/researchers/education-public-outreach/

Expanding your Horizons Network: 
http://www.eyhn.org/aboutmain

International Particle Physics Outreach Group:
http://ippog.org/resources/types/activities