When internet assignments are added, you might encounter a problem viewing the assignments if you do not have the same programs. There is a couple of sites available that are free of charge which you can download to your computer. These sites are read-only and you will not be able to create presentations or make any changes.
Be sure to follow all of the directions on the downloads. I have not tried these sites, but ran across them while viewing information from other sites.
Free Microsoft Powerpoint Viewer Download:
Free Microsoft Word Viewer Download: