Structured practice one adds the cast a step at a time; practice two has the student teach it back. That is pedagogy — the plan built on how people learn, not a tactic — and neither is worth grinding past three or four minutes.

What the instructor says

• Build it like a car. Check every weld, then the motor mounts, then the next part; build the cast that way and creep comes out in five or ten minutes, not two years of muscle memory.
• Structured practice one. Demonstrate the steps — “pick up and lay down”, smooth acceleration to a stop as the line comes off the ground — then add: one, then one and two, then one, two and three.
• Structured practice two. “My student teaches me”: they run the sequence and call the steps; with a group, A teaches B and B teaches A. Teaching is one of the best ways to learn, and raises the level of concern.
• Three or four minutes. If they do not get it in three or four minutes, they will not get it. His double-haul student did pickup and lay down for 20 minutes, then double-hauled 50 feet in the last five.

Putting it to work

1. Demonstrate, add a step, repeat.
2. Pair them up to teach each other.
3. Three- or four-minute limit, then switch.

Source

From the FFI CI walkthrough series by Dayle Mazzarella (Chapter 3 — FFI Casting Instructor Certification Tasks, Fly Fishing Coach International), lesson 15 part 1, 00:01:34, lesson 15 part 2, 00:05:26 and 00:06:05, and lesson 23, 00:18:04. See the video library for the series and the CI exam section for the teaching tasks; terms follow the FFI Fly Casting Definitions.