At my new TKD class we always start with a warm up and stretching, then some light pair work doing kicking drills. After that it's basics, solo and combination techniques moving back and forth up and down the dojang in rows.
Warm ups, kicking drills and basics are always done, but the rest of the class changes every lesson.
Sometimes it can be more basics, or teaching new combinations/techniques. Other times it can be patterns or self-defence work or one of the various types of sparring we do (points, continuous, full contact and WTF rules are the main types we practice) or weapons work or fitness/conditioning session.
Tonight the main chunk of the lesson was spent doing pad work and using the heavy bags.
After that, we usually finish with 1-2 self defence techniques (unless SD has been the main focus of the lesson) or joint locks.
There's also a cool down and further period of stretching at the end.
After class has officially finished most of the adult students stay behind to work on knife defence or stick work or some of the self defence techniques that Sah Bom Nim won't do with the children or other areas we just want to work through.