Start with what it is for: a bank or trees behind you, a sunk line, slack on the water. Then build the static D loop, name the anchor, walk the six steps.

What the instructor says

• D loop and anchor. Rod at 2 o’clock, 30–45 ft; the D hangs below a straight leg, the anchor is where the line leaves the grass.
• Six steps. Down, over, up, check, forward with a tip cast, follow the line down: “one is down, two is over, three is up, four is check.”
• Railroad tracks. Outgoing and returning line stay parallel; cast to the open side.
• They teach you. Demo once, then “you teach me”; hand over hand, eyes closed.
• Round loop. A domed tip path or too-fast acceleration: pound a nail into the palm tree, stop at 10.

Putting it to work

1. Run the 25 to 100 percent drill, eyes closed, slow start, pop at the end.
2. Then the dynamic anchor: swing the line up, deliver as it slides back.
3. Roll slack off the water with it; one of its most important uses.

Source

From the FFI CI walkthrough series by Dayle Mazzarella (Chapter 3 — FFI Casting Instructor Certification Tasks, Fly Fishing Coach International), lesson 24, 00:04:20. See the video library and the teaching-task pages for the exam wording; terms follow the FFI Fly Casting Definitions.