Thanks for the feedback. I'll get some of that fixed.
As for "fatalsToBrowser", that's part of the reason why there's a (limited) search box in the upper right corner. Enter 'fatalsToBrowser', select "users.easystreet.com" and click enter. The very first link it displays is for my third lesson. In that lessson I cover security and I discuss that very issue. My course really is a course just like you would have in school: lessons are progressive and build on one another. I suppose that should be more clear.
Update: Those are fixed, with the exception of how to refer back to my previous information regarding fatalsToBrowser. I'll have to give that some thought.