Oh... I forgot you hadn't had Catherine for Physics 8.
They're short (usually multiple choice) conceptual questions asked during a lecture where you think about it by yourself first, then confer with the people around you. At big universities, they often use this a lot in intro classes; students have "clickers" that are remote controls permitting them to answer and the professor to see how people are responding. I wouldn't be too surprised if they do that at UCSB... the method was first developed by Eric Mazur at Harvard.
no subject
They're short (usually multiple choice) conceptual questions asked during a lecture where you think about it by yourself first, then confer with the people around you. At big universities, they often use this a lot in intro classes; students have "clickers" that are remote controls permitting them to answer and the professor to see how people are responding. I wouldn't be too surprised if they do that at UCSB... the method was first developed by Eric Mazur at Harvard.