Based on Guru Nitya Chaitanya Yati's superb elucidation in Living the Science of Harmonious Union, here are the Class Notes for the Portland Gurukula class starting in 2022. I've added in the best from our earlier class, 2008-2011, and from my work in Nancy Yeilding's first online course. The complete notes from the first class are available on the old website, here. The book may be ordered (with difficulty) from the publisher, here.
The first fifteen sessions cover Nitya's Yoga Letters, explicating the basic premises of Yoga. After that come the Samadhi Pada and the Sadhana Pada, taken in depth, one sutra at a time.