Schucman was a clinical and research psychologist, who held the tenured position of Associate Professor of Medical Psychology at the College of Physicians and Surgeons at the Columbia-Presbyterian Medical Center in New York City. It is claimed that A Course in Miracles was "scribed" by Schucman between 1965 and 1972 through a process of inner dictation. She experienced the process as one of a distinct and clear dictation from an inner voice, which earlier had identified itself to her as Jesus. Schucman's scribing of A Course in Miracles began with these words: "This is a course in miracles, please take notes."

Wouter Hanegraaf distinguishes Shucman's process as a type of channeling that articulates revelation clarifying that "...in cases of inner dictation in which the medium hears a voice dictating messages, (s)he writes down [these messages] in a fully conscious state." Hanegraaf continues by specifically characterizing Shucman's case as spontaneous channeling indicating that "...[o]ver the years the voice proved to be remarkably consistent, stopping the dictation when interrupted [by Shucman's daily activities] and continuing at the next opportunity." Hanegraff also references specific dialogue between Shucman and Thetford citing author Robert Skutch, among other authors, including Kenneth Wapnick, whom Hanegraaf indicates as a "good" source for complete discussion on this subject.

During her tenure at Columbia University, Schucman worked with William Thetford. During this time, Schucman worked in a collaborative venture with Thetford in scribing A Course In Miracles (ACIM) and also with its initial edits.

The main transcription process took seven years, from 1965 through 1972, during which time she would take down the notes in shorthand, then each day read back these notes to William Thetford, a colleague at Columbia, who would type them out while she read them. After all the ACIM material had been initially transcribed it was then edited for publication by Schucman and the other two primary editors, William Thetford and Kenneth Wapnick.

Schucman also wrote two supplemental ACIM pamphlets by the same process as well as a collection of poetry later published as The Gifts of God. Following the transcription and editing, Schucman began to reduce the level of her direct involvement in the ACIM related effort and was never as heavily involved with teaching or popularizing the material as were its editors, Bill Thetford and Kenneth Wapnick.

In a manner which is highly atypical for such a prolific modern American 'scribe', Schucman did not seem to turn her experiences into any significant financial advantage, nor did she cultivate personal celebrity.

In 1980 Schucman was diagnosed with advanced pancreatic cancer. After a prolonged illness, she died of related complications at age 71 in 1981.

Absence from Felicity: The Story of Helen Schucman and Her Scribing of A Course in Miracles is the only biography of Schucman. It was written by her longtime friend Kenneth Wapnick. After Schucman's death, Wapnick founded the Foundation for A Course in Miracles, the organization that holds the copyright to A Course In Miracles.

• (discusses the pre-publication history of ACIM)
• (discusses Helen Schucman and the pre-publication history of ACIM)

Helen Schucman