The next day she brought blackboards, chalk and other teaching tools and improvise her own little train platform school.

FORBES: Angel

Some of them may get a taste for a career in teaching and go on to train to be a qualified teacher.

BBC: Spin on classroom assistants

When the railroad -- it's right next to a railroad, and when the train runs by, the whole building shakes and the teacher has to stop teaching for a while.

WHITEHOUSE: Presidential Press Conference

The end goal is to have a better sense of what makes teaching work so that school districts can start to hire, train and promote based on meaningful standards.

WSJ: Bill and Melinda Gates on Teacher Evaluation