Here are some great resources you might enjoy reviewing about the topic and how Susan approaches loose leash walking. Wondering where Susan gets her great long leashes? Check out 4MyMerles for their selection of leashes.
Episode 40: Using a Head Halter on a Dog, Why My Approach is so Different
https://dogsthat.com/podcast/40/
This podcast #39 has a bit at the end about some fun pre-games to shaping a head halter and building confidence through 'conditioning' behaviours.
Podcast Video: Is a Resistant Dog a Stubborn Dog?
https://dogsthat.com/podcast/39/
Episode 53: Stop Your Dog Pulling on Leash and Start Walking Together
https://dogsthat.com/podcast/53/
Episode 73: Why Your Dog Is Still Pulling on Leash And How To Fix It
https://dogsthat.com/podcast/73/
Episode 76: Leash Walking: Distracted, or Reactive Dog? These Games Will Help!
https://dogsthat.com/podcast/76/
https://susangarrettdogagility.com/2020/02/rz-for-dog-sports/
Episode #24: Help for the Dog Who Chases Chipmunks, Bicycles, and the Neighbor's Cat
https://dogsthat.com/podcast/24/
Susan's blog/podcast is an excellent resource for training needs outside our classrooms.