 
Our second midterm will be held in class on March 25.
| Test | Day | Date | Time | Points | 
| Exam 2 | Thursday | March 25 | in class | 30 | 
I have posted a practice second exam. The triangle orbits page from our first class may also be worth revisiting, now that we have studied Burnside's lemma.
| Triangle Orbits | 
| Practice Exam 2 | 
I am offering two problem sessions before our second exam.
| Day | Date | Time | Place | 
| Tuesday | March 23 | 7:30 pm | Diana 504 | 
| Wednesday | March 24 | 7:30 pm | Diana 504 | 
Note that Diana 504 is not our usual classroom.