Great Source iWrite from the Houghton Mifflin Harcourt company features an awesome animated and narrated glossary of grammar terms. In this glossary you will find animated, narrated videos explaining the use of punctuation. You will find the same type of video explaining the parts of speech and mechanics of writing.
Applications for Education
If you require students to do any type of formal writing, the Great Source iWrite glossary of grammar terms is a great reference to link to your class blog or website.