https://www.southampton.ac.uk/~cpd/history.html

From the Big Bang 13.8 billion years ago to 2021

Chinese language flash card app.

https://apps.ankiweb.net/

teaching kids math.
http://naturalmath.com/

From the Tim Ferris 4 hour workweek blog written by Benny Lewis.
http://fourhourworkweek.com/2014/03/21/how-to-learn-a-foreign-language-2/

#1 – Learn the right words, the right way.
#2 – Learn cognates: your friend in every single language.
#3 – Interact in your language daily without traveling.
#4 – Skype today for daily spoken practice.
#5 – Save your money. The best resources are free.
#6 – Realize that adults are actually better language learners than kids.
#7 – Expand your vocabulary with mnemonics.
#8 – Embrace mistakes.
#9 – Create SMART goals.
#10 – Jump from Conversational (B1) to Mastery (C2).
#11 – Learn to sound more native.
#12 – Become a polyglot.

http://josefwigren.com/hangul-in-20-minutes/

knowledge well explained
https://www.youtube.com/user/CGPGrey/videos

http://www.grovo.com/how-it-works
Sort of like lynda.com but with 1 minute lessons.
“Each day, Grovo takes the top sites, apps, and topics on the Internet and creates 15+ 60-second video lessons teaching you only the things you need to know. “

http://duolingo.com “With Duolingo you learn a language for free while helping to translate the web”

I using this to learn Spanish. I’m pretty impressed with the clean interface and interactivity.