21 bars, 1:41, at 50 BPM: slow enough that every note is exposed. Crash, ride, hi-hat, snare, high tom, mid tom and floor tom and nothing else.
The beat the song is built on is one bar, played through bars 1-4 and 10-13 -- 38.1% of every bar the kit plays. Learn that one and most of the song is already under your hands.
21 bars across 4 sections: 16 keep time and 1 is a stop. The longest unbroken stretch of time is bars 15-20.
50 BPM, in 4/4, with the time kept in sixteenth notes. Slow enough to hear every mistake, which is why the room lets you sit at the written tempo rather than under it.
20 out of 100: straightforward, and the one thing to watch is how often it moves around the kit. The beat itself is 0 out of 100; the rest of the number is everything around it.
21 bars, about 1:41 at the written tempo. The course breaks it into 9 exercises over 3 sittings, about 20 minutes each.
crash, ride, hi-hat, snare, high tom, mid tom and floor tom. That is most of a full kit; the part moves around it rather than sitting in one place.