The beginnings of A Class in Wonders may be tracked back to the collaboration between two individuals, Helen Schucman and Bill Thetford, equally of whom were distinguished psychologists and researchers. The course's inception occurred in early 1960s when Schucman, who was a medical and research psychologist at Columbia University's College of Physicians and Surgeons, started to experience a series of internal dictations. She defined these dictations as coming from an internal voice that discovered it self as Jesus Christ. Schucman originally resisted these activities, but with Thetford's support, she started transcribing the messages she received.

Over a period of eight decades, Schucman transcribed what can become A Program in Wonders, amounting to three amounts: the Text, the Workbook for Pupils, and the Handbook for Teachers. The Text sits out the theoretical foundation of the class, elaborating on the primary a course in miracles  and principles. The Book for Students includes 365 classes, one for each time of the entire year, made to steer the audience through a day-to-day training of applying the course's teachings. The Guide for Educators provides more advice on the best way to understand and teach the maxims of A Program in Wonders to others.

One of the central styles of A Class in Miracles is the notion of forgiveness. The class teaches that correct forgiveness is the important thing to inner peace and awareness to one's divine nature. Based on its teachings, forgiveness is not merely a ethical or moral practice but a basic change in perception. It involves making get of judgments, grievances, and the notion of failure, and alternatively, viewing the entire world and oneself through the contact of enjoy and acceptance. A Program in Wonders stresses that correct forgiveness results in the acceptance that people are all interconnected and that divorce from each other is an illusion.

Yet another significant part of A Class in Miracles is their metaphysical foundation. The program gift suggestions a dualistic see of truth, unique between the pride, which represents separation, concern, and illusions, and the Holy Spirit, which symbolizes enjoy, reality, and spiritual guidance. It shows that the pride is the source of enduring and conflict, while the Holy Heart provides a pathway to therapeutic and awakening. The target of the class is to simply help persons surpass the ego's confined perception and align with the Holy Spirit's guidance.