The appropriately named Convert PDF to Power Point does exactly what it says. Simply upload your PDF document, enter an email address for it to be received at, and wait a minute or two. You’ll get an email with a link to download your new Power Point file.
The service is free but they do state a limit of just 3 pages, although when I tried it out, I actually got my whole 10 pages. For anything longer you would most likely have to break the PDF document up, but there are other free tools online that can help you do that, like Split PDF.
The best part is that the Power Point presentation file you receive is fully editable. I imagine this is something that would come in handy for students or for last minute changes when you’re not by your computer.