The case-based approach is a constructivist instructional strategy that helps students apply their emerging knowledge by studying design problems in authentic real-world situations. One important instructional strategy in case-based instruction is to analyze cases in small groups before discussing them with the whole class. This study investigates the use of small-group structure to analyze case studies in online learning environments, as well as students' perceptions of the use of VoiceThread presentations to improve their learning of instructional design. The results show that a small group strategy has great potential to help students analyze case studies and consequently enhance learning. The implications of these findings for instructional designers and online instructors are discussed.