Recognizing a need to develop religious instructional material for mentally retarded seminary students of the L.D.S. Church, this study was designed to validate an instructional model set up to teach the concept of faith.Thirty-four mentally retarded seminary students were randomly assigned to six control groups and six experimental groups. Each group was given a sixteen question pre-test. Then, the next day each experimental group was given instructional treatment and the post-test, while the control groups only received the post-test. The Study was geared for a two hour period of time. Results obtained from the analysis of covariance showed a significant difference beyond the .01 level on post-test results of the experimental groups when compared to the post-test results of the control groups. Thus, the null hypothesis was rejected.