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Acceptance of human evolution seems to be the majority position for the U.S. population; however, acceptance of evolution among conservative Christian groups is low, sometimes below 50%. There are many different reasons for this low acceptance, leading to a significant disconnect between scientific specialists and the general population. This study examined students in an introductory biology class at a large public university. Semistructured in-person interviews were conducted to better understand students' belief in evolution, or their lack thereof. At the beginning of the semester, 19 of the participants accepted evolution, a number that increased to 29 students by the end of the semester. In contrast, only eight students accepted human evolution at the beginning of the semester, but the number increased to 21 students by the semester's end. The interviews elucidated three essential factors that can change students' minds: teaching the evidence of evolution, providing the influence of a role model to reconcile religion and science, and assisting students with overcoming misconceptions about evolution.

Instruction that increases acceptance of evolution is essential to effective biology instruction, but instruction about evolution is not consistently correlated with increased levels of acceptance. Does the pedagogical approach utilized make the difference? Using a curriculum that demonstrably increases evolution acceptance, we compare multiple pedagogical styles (behaviorist vs. constructivist, active vs. less active, and journaling vs. not journaling) in a full-factorial design to test the hypotheses that pedagogy designed for constructivism, active learning, and reflexive journaling will increase the probability that students' acceptance of evolution increases. Though we observed statistically significant acceptance gains, no treatments were statistically different from the other treatments regarding those acceptance gains. Evolution acceptance is possible despite the use of constructivist-designed or behaviorist-designed pedagogy, active learning or less active learning, or maintaining a reflexive journal or not. There is no indication that any combination of these instructional approaches has a greater effect than any other on evolution acceptance.