I can't speak for all universities over here, but my undergrad had a single textbook from what I recall. The rest were all printed notes or simply lecturers writing with astonishing speed on the blackboards.

There was certainly extra reading we could do, and I'm sure someone did. But most of the learning was from attending lectures and watching someone go through things step by step.

I'd be interested to know if other courses are more textbook based - although I know which I would choose.