I guess that didn't come out like I meant it to. I understand that part but I was thinking along the lines of books like 101 Arena Excercises. It kinda has "patterns" to ride that include things like turn on the forehand, leg yielding, etc...
oh i understood you, i just think books like 101 arena exercises don'[t have much value. if you were to just go down the track or from the quarter line and leg yield correctly, it would supple your horse. the thing is with a book like that ypu get no feedback and that's what ypu need, and that's why lessons are needed.
All the classics list suppling excercises. Might try Zettl (Dressage in Harmony), Podhajsky (Horse and Rider), and Sally O'connor (essential excercises...).
One of the classicists, can't remember exactly but think it was Podhajsky, wrote that LY is a waste of time because why would you teach it without the proper bend then change it later (talking about not just going to half pass). If you are going to bend the horse, shoulder-in in various excercises probably does more.
Zettl and O'Connor's books have lots of excercises. I have found that the full training books are better usually as they explain the why's and how's best, telling you when to integrate things which is important.
poadhajsky came from a school of thought as does the SRS where they very rarely use Leg Yield and i was with a trainer for many years who had very little use for it,l and you can read knopfhardt and many others who have very little or absolutely no use for it.
they are able to supple the horse 'in the work', just by how they ride and bend and work the horse, and for the rest of the world, there is leg yield.