Moodle will be offline briefly starting at 7:30 tonight, while the mathematics engine used for randomly generating questions is upgraded.
The upgrade appears to have gone successfully; initial testing shows no issues. Please report any issues to email@example.com.
This is a significant upgrade that may affect grading, so Moodle will be unavailable for at least a half hour. Moodle will be placed online once we're relatively sure the currently open homeworks and quizzes are not affected.
Thank you for your patience.