For extra credit opportunities, check out the Problem of the Week! Each POW is worth bonus character points, 1 if you attempt it (with work shown), or 2 if you get it right (also with work shown).
You can find them on ECHO as well, and I will accept each POW for two weeks.
POW1 (accepted until 9/4): Party Time!
POW2 (accepted until 9/11): TBA