Cross Coordination and Rider's Seat
I have done several clinics with Dirk Bolten (certified Balance in Motion Trainer by Eckart Meyners and Life Kinetic Trainer) when Dirk offered me to take part in a clinic exclusively for trainers focused on Cross Coordinatio. We all have heard about inner leg to outside rein. This is easy to tell your students, but hard to achieve for some, especially when they have balance problems in movement and when they have cross coordination problems which both can be trained with simple exercises.
Here a video that shows some of the exercises and explaines a little bit the idea of Eckart Meyners: https://www.youtube.com/watch?v=BnySMACnnwc