I think it depends on if your doing email submissions or regular mail submissions. If you're communicating with your instructor by regular mail the talk abouts should be included when they mail your lesson back to you. However, if you're sending your lessons by email, you'll need to go to the student center to download the talk abouts.
At least I think that's right. I did the first part of the course by regular mail and the talk abouts were always included. Now I'm doing it by email and I have to download them.
Hope that helps.