I've been a bit slow on this one but I just took a read of the 'Open Syllabus' document for this course. For anyone else who's been a bit late getting into it:
Evaluation for the course consists of 8 quizzes (20 points each) and a final exam worth 100 points, for a total of 260 points. A score of 70% (181 points) is required to 'complete the course successfully'. Late exams are worth a maximum of 15 points each.
The first quiz (Overview of Brewing) becomes available January 22 and is due Jan 24 (American time). Dates for the other assessments are in the document 'OpenSyllabus.pdf', available in the 'Introduction' section under 'Lessons'. It also contains a section 'How to take this Course', and other useful reading - I recommend people read this if they haven't already.