View full lesson: http://ed.ted.com/lessons/when-to-use…It’s possessive. It’s often followed by S’s. And it’s sometimes tricky when it comes to its usage. It’s the apostrophe. Laura McClure gives a refresher on when to use apostrophes in writing.Lesson by Laura McClure, animation by Karr

Source: http://www.youtube.com/watch?v=My6oGvkHnfY