Afraid of unleashing YouTube in the classroom? Cant blame you one bit. That doesn't mean that YouTube shouldnt be used, it just means that you must be extrememly cautious when using it. But fear not cautious educators, there is a solution - TeacherTube. TeacherTube is almost identical to YouTube in every way. The only difference - all content is classroom appropriate and geared exclusively for educators and students.
Definately bookmark worthy.