Homework 1, which I’ve given back to almost everyone now, doesn’t have a lot of explanatory comments on it. That’s because there’s a key, which you can consult. That key will be posted tonight. There is a password for downloading the key, which I will give out in class. However — once it’s posted, you can also just email me for the password.

Homework #1 was out of 35 points. I don’t generally adhere to any strict percentage-grade correlations, because what “85%” means depends in large part on how hard the homework was. Specifically, don’t assume that a score of 21 is a D. It’s certainly better than that. I’ll try to give you a way to estimate where you stand with respect to actual end-of-the-course grades, but don’t panic immediately if your homework score was lower than you’d hoped.