From Linda Friedman:

For my STA 2000 class, I inserted narration into my Powerpoint slides. We only missed 2 classes, but I created 4 of these pseudo-classes. While you don’t have the interaction of a “real” class, the advantage here is that each student can play to the instructor’s explanation of difficult material as often as necessary and progress at his/her individual pace. I’m going to continue to use this technique even without the incentive of hurricane days.

To insert narration into slides…

• Select the slide you’d like to add narration to.
• Go to Edit –> Audio –> Record Audio… (or Audio from File… if you’re inserting audio that you’ve recorded previously).
• Make sure the proper input device is selected (Built-in Microphone or any external microphone you have attached to your computer)
• Click the red Record button to begin recording.
  • You can click the Pause button to pause your recording, then click it again to pick up where you left off.
  • When you’re done recording, click Stop.
  • Clicking Record again after clicking Stop will erase anything you’ve previously recorded to that slide and replace it with the new recording.
  • Click the Save button at the bottom of the window to save your recording.

A speaker icon will show up on the slide to let you know that it has been inserted. You can test the audio by clicking the speaker icon, then using the player that appears underneath it.