Would you like to load your class lectures up to bspace for student review? If the lectures were created with PowerPoint, it is preferable to convert the files to PDF format first. PDF files are easily readable by using the free Adobe Reader application, whereas PPT files usually require the (not free) PowerPoint application for viewing.
Follow these instructions to convert a PPT file to PDF. If you are using a Mac, the PDF file is not automatically compressed and can be too large for bspace to accept. Follow these additional instructions to compress PDF files if you are on the Mac platform.