Keep the brain sharp and engaged with these talks that make it fun to avoid the "summer slump."
Karim Abouelnaga
A summer school kids actually want to attend
John Green
The nerd's guide to learning everything online
Magda Sayeg
How yarn bombing grew into a worldwide movement
Shubhendu Sharma
How to grow a forest in your backyard
Hannah Brencher
Love letters to strangers
Sarah Parcak
Hunting for Peru's lost civilizations -- with satellites
Gever Tulley
Life lessons through tinkering
Cesar Harada
How I teach kids to love science
