We're a small, non-profit tech startup bringing a free, world-class education to anyone, anywhere.
Millions of people in all walks of life use our free platform to learn (check out testimonials at https://www.khanacademy.org/stories). Most of you reading this are probably familiar with Sal's videos, but we also have hundreds of videos by other teachers and a huge library of interactive exercises.
A few things we're currently working on building right now:
– Mobile apps to help students learn on the go and increase access to those who might not have access to a computer 
– Improved knowledge models so we can better predict what you know and what will help you 
– Infrastructure to make the site more reliable and faster for our millions of visitors every month 
Our current summer interns have already started arriving(!), but we'd happily talk to intern candidates for future terms.
Apply at https://www.khanacademy.org/careers