Have you ever wanted to put a PowerPoint on the web so your students could review the material? What if a student was absent? You could also have your students watch a presentation before coming to class so you could have more conversations about the topic in class.
Slideshare allows you to accomplish this and here is a three step process that will allow you make something like this.
Step 1 - Uploading your PowerPoint to Slideshare
Step 2 - Making your voiceover in Audacity
Step 3 - Syncing your voiceover with your PowerPoint