 It was good old pen and paper. I think the biggest challenge in this first class is going to be staying focused because usually this is the class that I'm on my computer and I'm doing other things like, I don't know, looking for an apartment or something like that. So the result, honestly, I felt so locked in in this class. Like I felt like I really understood what was going on. Like I understood the points that were being laid down in the lecture. When you think about it, it's not surprising.