How Backward Learning Works Roshan uses Microsoft PowerPoint to recreate problems from each chapter of the textbook. She turns on Camtasia and begins talking her way through the solution to the problem. "I'm just capturing my screen and my voice," she said. The recordings, which she edits and posts to a school-hosted site, a Camtasia-hosted site, as well as to iTunes, run between 10 and 30 minutes long. So far she's made 32 of them, covering six chapters in the book.