This study describes second language learners' use of interactional options (e.g., a glossary usage) within New Dynamic English, a listening-based computer-assisted language learning (CALL) program produced by DynEd International. The study then elaborates on the students' use of options and how it relates to the students' performances within the program and their second language (L2) learning. Student choices in an interactive multimedia environment and modification of input are discussed. Results from this study, though they conflict with past research, have important implications for future L2 teachers and researchers in second language acquisition (SLA) and CALL. This study was performed in an authentic learning environment and points out the benefits, drawbacks, and the need for much more authentic learning research.