In the Fall of 2024 I am teaching Master Classes for Gamaste in France: September 30 in Paris, and October 2 in Lyon. Each one day master class is a brief, but in-depth FACS primer, featuring: a history of FACS’s development, a brief dive into the “how to’s” of this anatomically-based methodology for facial measurement, and a discussion of crucial considerations for the application of this measurement tool and knowledge of its parts (namely the action units or AUs) to the creation of moving faces in the arts. This primer should instill an appreciation for subtleties of facial movement, while helping the curious decide if learning more about FACS or the application of FACS is useful to them. A one-day training is not sufficient to learn the full FACS system, but it will be a deep sampling that gives the learner a good sense of what FACS is and how to apply it.