Hi J. David,
It seems that you may be looking at an older, archived version of the training curriculum. I'd recommend checking out the updated learning path here. It has all new content with exercises and a better interface.
I enter the link that yo sent me and it still takes me to the previous version. How can i reset it?
I looked at your profile and it seems like you were enrolled in both. I've cleared up the previous version so you should see the new path only now.