David’s considerable and beautifully organized assortment of audio teachings can be found at acim.me. The e-book is split into 3 sections: the Textual content, the Workbook, plus the Guide for Teachers. All are overflowing with functional spiritual knowledge. However the "motor area" on the Course is its daily Workbook classes, https://awakening-mind.org/resources/a-course-in-miracles/