Typo fix: 'earned' rather than 'eared'

I think that women usually earn degrees, rather than ear them. :-)
Merge pull request #1 from rachelthompson/master

Typo fix: 'earned' rather than 'eared'
Changes for May 2014 class.

- New demo for audio.
- New demo for video.
- Simplify n-th child and remove activity.