Carl Jung is perhaps too easily overlooked in undergraduate teaching. Because scientific psychology, as well as traditional psychoanalysis, tends to devalue anything vaguely mystical, spiritual, or transpersonal, Jung's work becomes a prime candidate for scapegoating or neglect. Precisely because Jung focusses on dimensions of human experience that are not readily explained by or amenable to more conservative perspectives, I feel his work needs to be explained fairly and accurately to undergraduates. Concepts such as synchronity, archetypes, the collective unconscious, and anima/animus are not just fascinating, but powerful in their ability to capture aspects of the psyche not fully explored by other theories.
Jung's ideas have been particularly useful in the I Ching, Imagined House, and Shadow exercises that I use in class.
The Collective Unconscious