Order of Magnitude Estimation Book - Very readable ebook about the value of estimation and plenty of practice

(type: web.stanford.edu/class/ee353/SanjoyMahajanIntro-01-1.pdf into address windo if link does not work)

 AAPT Physics Photo Contest - Into Photography? Take a photo and explain the physics displayed.

Hyper Physics by Georgia State University Physics and Astronomy Dept  Fantastic summaries of just about every topic within physics. Great concept maps to help you develop your understand of the domain of knowledge known as physics.

Some beautiful chemistry vidoes:

uhttps://www.youtube.com/watch?v=BGUfC3UUBkI  Precipitation

uhttps://www.youtube.com/watch?v=iKtB_uACiQc  Black snake reaction

uhttps://www.youtube.com/watch?v=CWMATrOatRw Thermite reaction that was used to solder together railroad ties.

uhttps://www.youtube.com/watch?v=mjkuSm__G7s&index=9&list=PL6E4F35510525FFF7 An explosive reaction.

uhttps://www.youtube.com/watch?v=8_82cNtZSQE Chemiluminescence

Comprehensive list of chemistry careers compiled by the American Chemical Society

https://www.acs.org/content/acs/en/careers/college-to-career/chemistry-careers.html

The Subdivisions of Chemistry called Areas of Chemistry and Areas of Applied Chemistry

https://www.acs.org/content/acs/en/careers/college-to-career/areas-of-chemistry.html