To me, error analysis is the sweet spot for improvement.

I believe that the Apple Shuffle is an excellent compromise among the conflicting requirements of simplicity, elegance, size, battery life, and function

Will robot teachers replace human teachers? No, but they can complement them. Moreover, the could be sufficient in situations where there is no alternative––to enable learning while traveling, or while in remote locations, or when one wishes to study a topic for which there is not easy access to teachers. Robot teachers will help make lifelong learning a practicality. They can make it possible to learn no matter where one is in the world, no matter the time of day. Learning should take place when it is needed, when the learner is interested, not according to some arbitrary, fixed schedule

Only the most sophisticated of beings can lie and cheat, and get away with it.

User-centered design means working with your users all throughout the project.

Attractive things work better When you wash and wax a car, it drives better, doesn’t it? Or at least feels like it does.

To me, error analysis is the sweet spot for improvement.