This would only apply to upper level classes. The thing about this, there can some specialized classes where reading source papers makes sense. But honestly, even for those classes, usually a good survey book can be better, more concise than the source papers. It depends. But I don't think this would make sense of Algebra or Calculus ... or probably any class besides more specialized ones. I mean, you could teach a Distributed Systems class with source papers; I think that would be OK but it would probably be good to have a textbook as a reference.