According to their website, "Voki is a free service that allows you to create personalized speaking avatars and use them on your blog, profile, and in email messages." This is a great option for student-created videos without compromising students' privacy. It can also be handy way to capture your students' attention while simultaneously introducing the day's agenda or directions for an activity. Voki could also be used to create a virtual substitute teacher for days when you know you will be absent. Simply embed your Voki on the classroom website and the sub can play the audio file to the class. Below is a sample Voki I created in about five minutes.
Voki for Education FAQ http://www.voki.com/voki_faq.php#4
Voki Lesson Plans http://www.voki.com/lesson_plans.php
Dr. Jessica Pilgreen, Ed.D.