Gilbert Strang would do a version of this too: appearing to work through problems on the fly and asking the audience for help, when of course he had come up wit

Gilbert Strang would do a version of this too: appearing to work through problems on the fly and asking the audience for help, when of course he had come up with the problems himself and made them readily solvable to illustrate the concept he was teaching. You can see instances of this in his last lecture in 2023. https://www.youtube.com/watch?v=lUUte2o2Sn8 https://www.youtube.com/watch?v=lUUte2o2Sn8