The syllabus sheet with other course information was handed out on the first day of class. Please note that the printed version had an error in the dates of the midterm exams. They will be on Oct 1 and Nov 5, both of which are Fridays.

There will be no regular class this Friday 12 Nov. Instead we will have a virtual-reality demo of three-dimensional hyperbolic and spherical spaces in the NCSA's CAVE at the Beckman Institute. You have signed up for a 20-min slot (between the hours of 7:40pm and 9:40pm) on Thursday evening. Please enter Beckman at the east door (by the small parking lot off Matthews just south of University). The building is usually locked in the evenings, but may be unlocked this Thursday. In either case, meet near that entrance, and someone will be there to let you in and bring you up to the CAVE on the third floor. We can take a maximum of 10 people at a time for the demos.

The homework assignments and other handouts will be posted as they are assigned.

Note that you must build a hyperbolic plane before Monday's class, Oct 11. If you didn't get the handouts on Friday, you can find them below. In any case, you'll want to look at the instructions.

The two printed sheets we gave you for cutting out and constructing hyperbolic planes are available here as PDF files. The first has annular segments and the second has polygons. These will print onto US letter paper (8.5x11"); we then enlarged them to 129% to xerox as big as possible onto ledger paper (11x17").

You can now check your grades for this course here online. Once you enter your campus netid and password, you'll see a line for each course you're enrolled in that uses the math dept's grading program. The line for Math 302 will show your scores so far on the homeowrk and first test. Note that, to allow for the possibility of dropping up to two homework grades, we have entries for hw98 and hw99 which are put in only if you do one of the things listed below to drop a grade. The notation ** is used for the grades that actually do get dropped.

You can earn the right to drop up to two of your lowest homework grades. One way to drop a grade is to attend a math seminar. You should e-mail us to let us know when you go. We will then ask you to say a word about it in class the next day. Two particularly appropriate seminars are:

- Geometric Potpourri, Tuesdays at 2:00 p.m. in 243 Altgeld Hall (see the department's Weekly Calendar for listings), and
- Mathematics in Science and Society, some Tuesdays at 4:00 pm in Altgeld 245.

The new edition of the textbook, Experiencing Geometry by David Henderson, is available as a photocopied course packet at Notes-n-Quotes, 502 E John St, 344-4433, under "Math 302/Sullivan".

Please bring the following materials to every class:

- a bound composition book for your journal entries;
- scissors and construction paper;
- transparent tape and thin masking tape;
- the tennis ball we lent you as a model of the sphere.

The graders for the course will be Man Li and Thomas Kuhnt, who both have mailboxes in 250 Altgeld.