David’s substantial and superbly structured assortment of audio teachings can be found at acim.me. The ebook is split into three sections: the Textual content, the Workbook, plus the Manual for Instructors. All are overflowing with practical spiritual wisdom. Nevertheless the "motor room" on the Course is its day-to-day Workbook classes, https://awakening-mind.org/resources/a-course-in-miracles/