This mixed method study explored Christian teachers' beliefs in religious schools on evolution, their attitudes toward evolution, and their perceptions on the effect of those beliefs on the teaching of evolutionary content. Teachers (N = 52) from Association for Christian Schools International (ACSI) accredited schools in California and Hawaii participated in the quantitative component of the study. Path analysis revealed that teacher beliefs had a significant effect on attitude, and attitude a significant effect on evolution teaching. Biology teachers were further interviewed from the sample. Results showed that teachers' beliefs regarding evolution and their Christian faith were mixed and complex.