How can therapists be effectively trained in clinical functional contextualism? In this conceptual article we propose a new way of training therapists in Acceptance and Commitment Therapy skills using tools from Functional Analytic Psychotherapy in a training context functionally similar to the therapeutic relationship. FAP has been successfully used as an adjunct to other therapeutic modalities. We suggest that adding FAP to ACT training can be an effective way of developing therapeutic competence and adherence to the ACT model.