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...

Could we ever switch to this or any of the many other rational systems? Unlikely: tradition is difficult to overcome.

What makes something simple or complex? It’s not the number of dials or controls or how many features it has: It is whether the person using the device has a good conceptual model of how...

adults forget how difficult that task was.

Any time you see signs or labels added to a device, it is an indication of bad design: a simple lock should not require instructions.