This study investigated the impact of authoring hypermedia projects on the academic vocabulary development of middle school, ESL students. Vocabulary definitions, inprocess verbalizations, observations and semi-structured interviews were the primary means of collecting data and assessing vocabulary growth. The results of this study indicate that hypermedia authoring had a positive impact on students' understanding of grade level, science concepts as well as on student engagement in and attitudes toward vocabulary building activities. Thus, the procedures implemented in this study provide a potential model for teachers to follow as they attempt to facilitate their students' vocabulary and concept development.



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