In general, there are three ways that you can use PowerPoints within DigitalChalk:

1) You can embed them into chalkboards, which allows you to take advantage of the functionality within chalkboards, such as setting chapters, captions, etc.

2) You can export the PowerPoint deck as a pdf file, and then upload that directly to a course as a file.

3) You can also upload the Powerpoint as a Learning Package; these would allow users to flip through the material one page at a time, much like if they were watching someone else present it.