Ryan Woodruff, Firefish Aquatics
We are in a 50m pool to start the season. Almost a week in, we spent some time on butterfly foundational technique work, turns, and a little FRIM (IM except with free in place of the fly).
Fly, Turns, and FRIM
Free Swimming Workouts, Sets, Ideas, and Dryland Exercises from Professional Coaches Around the World
The Swimming Wizard 