The rapid growth of lecture capture and distance education in higher education is raising fresh concerns about accessibility, since it's difficult--if not impossible--for hearing-impaired students to use these tools effectively. As a result, many colleges and universities are renewing their focus on closed captioning as a viable solution.
While the impetus for closed captioning stems from a desire to accommodate students with hearing issues, schools are also discovering that closed captioning has broader appeal, particularly among students for whom English is a second language. And for the rest of the students on campus, there's one other big benefit: It allows them to search captured content quickly, by enabling keyword searches.
Read the full article at http://campustechnology.com/Articles/2011/08/01/Closed-Captioning-and-Getting-Your-Lines-Right.aspx?Page=1