Due to one reason or another sometimes a presentation may not upload correctly in the virtual classroom. Things may look odd or it may not upload at all. This is rare and always solvable.
Here are the steps we recommend:
1. Save your file as a pdf and re-upload. (90% of the time this will do it)
2. If you have a pptx, save it as a ppt or different version (older version)
3. Save the slides as images, then combine as a pdf. We've used http://online2pdf.com/ successfully.