A Course in Miracles: Supplements is part 4 of 4 (three books and one supplement) of the A Course in Miracles series. A Course in Miracles is also known as "the Course" or ACIM. Scribed by Dr. Helen Schucman, it is a self-study course that aims to assist listeners, readers, and students in achieving spiritual transformation. ACIM presents a purely non-dualistic philosophy of forgiveness and includes practical lessons and applications for the practice of forgiveness in one's daily life.

As its title implies, A Course in Miracles is arranged throughout as a teaching device. It consists of three books: Text, Workbook for Students, and Manual for Teachers. The order in which students choose to use the books, and the ways in which they study them, depends on their particular needs and preferences.

These two supplements to the Course, "Psychotherapy: Purpose, Process, Practice" and "The Song of Prayer", are also included as part of ACIM. They were also scribed by Dr. Helen Schucman and are extensions of its principles.

"Psychotherapy", begun in 1973 and completed in 1975, offers a summary of the Course’s principles of healing: two people joined in sharing a common interest or goal. While ostensibly written for psychotherapists, all readers can benefit from its teachings. "The Song of Prayer" was scribed in 1977, and its three chapters summarize the Course’s teachings on prayer, forgiveness, and healing. It first presents the ego’s wrong-minded understanding of these terms, which is then contrasted with the Holy Spirit’s right-minded view.

These supplements presuppose a basic understanding of the Course’s teachings, and are helpful adjuncts to a student’s study and practice of A Course in Miracles.