My class starts sometimes with some jogging around the dojo, working just some universal footwork things (shuffling, skipping, backwards run, etc) then we do some various stretches and warm up excersizes. We try to get every joint and muscle of the body loosened up. Then we do ukemi, 5 back falls sitting, 5 squatting, 5 standing...the same for right and left side falls. Then we do some more falling drills and some zempo kaiten and then we usually do uchi komi, left and right side, with three throws. Sometimes the instructor picks the throws, sometimes it is up to us. Then the instructor usually has a series of techniques they want to work on and we do that and finish with some randori