That is the purpose of your Class 1. To teach you how to teach the different exercises from different circumstances and make sure you are proficient before sending you for your class 4 ride. Same as an instructor should demonstrate many variables of stalls and forced approaches.
The flight test takes a random sampling of the exercises or lessons and works on that principle. Maybe not ideal, but more efficient and economic than demonstrating at length each exercise.
If the above comment was a sarcastic remark, disregard my response.
BTD



