This study examined the effects of different multimedia design modalities on middle-school students' motivation and achievement in history and also sought to determine whether an interaction effect on achievement occurs between students' prior knowledge and the different multimedia design modalities. Two groups of eighth-grade students enrolled in a rural middle school in a southern state created multimedia artifacts using two design modalities: video content design and visual content design. Each group consisted of 21 students ranging in age from 13 to 14. Both groups completed a history lesson on state governors and created video content or visual content, respectively. The results showed that students earned significantly higher achievement test scores when they were involved in the visual content design modality. However, no differences were found in each of the four motivation sub-measures. Furthermore, there was no interaction effect between students' prior knowledge levels and the different content design modalities.