In the 1st picture, you can see Reese came out to the end of the lead before she sat, but in the next picture, she did not strain to the end of the leash and sat before she got to the end of the leash without jumping up.
This week at home I have been trying some exercises from a book received at Puppy Camp a couple of years ago. The book is From the Ground Up: Agility Foundation Training
for Puppies and Beginner Dogs by Kim Collins. The exercise we worked on this week is called Stool work. It is an exercise designed to help the pup gain back end awareness. The idea is to have the dog come up onto the stool (which is only about 6 to 8 inches high) with their front feet and then move their back legs around the stool. Reese likes to balance herself on the stool, but does stand with her front feet on the stool and rotate her back feet around the stool.
The other exercise we have been working on at home this week is the nose touch to the hand. This can help bring the pup back into focus. I like to use it as a hands off approach to getting the pup where you want them.