As we started working, I told Chemaine that I am tired of having this same exact lesson, but no matter what I do - transitions, spurs, whip, I just can't keep Speedy in front of my leg. She laughed and said that it's a problem with many horses, some of hers included. Fortunately, she had a new lesson to re-address the problem.
Chemaine explained that Speedy is chosing to respond to my leg or my hand instead of both. When he won't respond to my leg, I often let go with my hand thinking that he needs room to go forward, so then he pops his head up and we get no real push from behind. So now, I have to insist that he NOT pop his head up. He needs to push from behind and lift through his shoulders. This is how we'll achieve throughness and collection.
After a few rounds with the whip, Speedy got the message and started to offer the biggest and loftiest trot he's ever given me. You can see it start to develop in the video.