This study investigated the relationship between students' learning styles and their achievement in two different learning environments: online instruction and traditional instruction. The results indicated that a) students in the traditional learning group had higher, but not statistically significant higher, levels of achievement than students in the online learning group, b) a student's learning style had no statistically significant effect on their course grades in any of the two instructional methods, and c) there was no significant interaction between the learning style and instructional method. (Contains 2 tables.)