If you have pictures that you’d like to share, instead of emailing individual photos or posting many images to your Blackboard course, consider creating a movie slideshow. With QuickTime Pro software, you can easily create a movie slideshow from a folder of images. While you may have the free QuickTime Player already installed on your computer, updating to QuickTime Pro ($29.99/Mac or PC) will enable you to create a nice-looking movie presentation of your photos.
Learn how to create a slideshow movie in QuickTime in just a few steps: http://images.apple.com/quicktime/pdf/QuickTime7_User_Guide.pdf
Try saving your PowerPoint presentation as JPEG images. If you have a large PowerPoint file with many images, saving your presentation as JPEG images, then creating a slideshow movie from the PowerPoint JPEGs will significantly reduce the size. Additionally, the movie file will be read-only and will display nicely on a Web page or Blackboard course page.