Yeah, we covered Potemkin for at least two weeks in one of my classes. We did the same for Joan of Arc as well. Difficult days in class, but totally understand why we did.
I wasn't a big Keaton fan and I could barely stand Chaplin until I saw the Great Dictator...for me, one of the greatest films of all time and Chaplin's best performance....(I seriously need to get that on DVD soon.)