Sweet cars- hate the brakes tho.
The fastest way to improve the racing line and general on track performance is to have the instructor ride along. Add a muffler, get a comunicator and run the driver at some PDX events. Even run a few Autocross with both of you and see how each of you differs and performs.
NASA does this but the SCCA schools dont yet.
As my son gets faster, we drive the car for 3-4 laps and switch seats, shake and repeat. When he started he knew a lot, now he knows that we can all go faster each day.Every day.
When you get the driver sorted, send me an email for a free copy of my book, just cuz you have a Fiesta.