How Hellen Keller Learned to Speak

I added some new interesting history and science 'twitter-ers' to my list, and I'm very delighted already by how much interesting stuff has turned up. Historians are so smart! Just putting that out there. Historytweeter posted a blog entry about this incredible video, and I just had to repost it. It shows Hellen Keller's teacher explaining the system she used to help her pupil understand spoken language and speak herself.

Just brilliant.