The exams will help you know if your doing thimgs correctly and you can contact your instructors through your my courses page under contact us if you have any questions about the material or aren't understanding something and they can help you. I don't believe that we are able to Skype with them however. You can also ask anything on here as well. Let me know if I can help anymore. And I hope I helped some! Good Luck in your program!
Serena