The grades for your final exam are now posted on coursework. Here is the statistical breakdown for the test:

• Standard Deviation = 23
• Mean = 86

All scores are out of 142, the total number of points on the exam.

The final room assignments are as follows. Assignments are based on the lecture section you are registered for on Axess. Please take the exam in the correct room, since there is no extra seating in any of our exam rooms!

• Dragos Oprea's lecture: Kresge Auditorium
• Nadya Shirokova's lecture: Meyer Forum
• Rafe Mazzeo's lecture (including ACE): Kresge Auditorium
• Todor Milanov's lecture: Kresge Auditorium

The exam is scheduled for Monday, March 19th, from 7 to 10pm.

Due to an error in writing up solutions to Midterm 2, some people who correctly answered 2(b) may have had their answers marked incorrect. The error was in the last coordinate of the projection vector: the correct answer has a -5 in the last coordinate, and the incorrect answer had an 11 in the last coordinate. If you had the correct answer marked incorrect on your midterm, please submit your exam to your TA so (s)he can give you back your credit.

One of your classmates recently lent out his gray TI-84 to someone in Math 51 and did not get it back. His name (Artemio Rivera) is written in marker on the back of the calculator. If you happen to have his calculator, he has asked that you get in touch with him on Facebook (under Arty Rivera).

A few of you have noticed that the final portion of Matlab 3 includes some `extra' questions, and that "it is up to the instructor's discretion to determine whether the problems ... count as bonus." I'm writing to tell you that these problems will count for up to 5 bonus points. You may attempt to solve these problems if you like, though of course there is no penalty if you decide not to attempt them.

Solutions for the second midterm have not yet been posted since there are still a few students who haven't taken the exam. Once we have all exams in, I will post solutions for your reading pleasure.

The midterms have been graded, and you should now find your score posted on coursework. Here is the statistical breakdown for the test:

• Standard Deviation = 13.1
• Mode = 59
• Mean = 48.7

All scores are out of 80, the total number of points on the exam. Let me remind you that we do not assign a grade for midterms, so there is no "scale" for me to tell you about. Students who did not perform as well as they would have liked need not despair; there is still ample opportunity to do well on the final, which counts for a significant portion of your grade.

One of the TAs has put together some extra linear algebra problems for students who are looking for problems outside of Levandosky and old midterms. I have posted them on the course webpage's test page.

Although these problems are not necessarily representative of what you'll see on the exam, they are good practice for your linear algebra muscles. If you choose to work on them and find them helpful, that's great. Otherwise, use them at your own risk.

You should show up 10 to 15 minutes early to find a seat. It is important that you take your exam in this exam location and not one of the other exam locations, as there will only be enough seats and exams in a given location for the assigned students. If you do not know how to get to your designated exam location, you can try searching for it at http://campus-map.stanford.edu Any other questions can be directed to either or your instructor.

The second midterm for Math 51 is nearly upon us. Next week you will receive an email with room assignments for the exam, but for now students who have a valid conflict with the scheduled exam time should contact to schedule an alternate exam time. As before, a "valid excuse" means a conflict created by another course or an out-of-town varsity athletic competition.

Students who cannot take the exam at the regularly scheduled time should send an email to the address above with

• A description of the conflict and
• A preference for an alternate exam time between
  1. Wednesday, Feb 28 from 6:00 pm to 7:30 pm and
  2. Thursday, March 1 from 4:30 pm to 6:00 pm.

In order to schedule rooms, send in your requests by **THURSDAY AT 5PM**.

One of your homework problems in assignment 5 (namely #28 from section 19) is a little ambiguous since the book actually has TWO problem 28s in section 19. The problem you should do for the homework is the second of these problems (the more computational of the two).

Also, the problems from section 23 cover a topic that some of you may not have seen in lecture yet but which you will all see by Wednesday. These problems will become quite approachable after seeing Wednesday's lecture, so rest assured that you will be able to complete them by Thursday.

You should get a good jump start on this week's homework if you haven't already done so. Since the MatLab assignment is also due this Thursday, and since there are quite a few concepts covered in this week's assignment, you will do yourself a real disservice if you start Wednesday afternoon.

This is a reminder that your first MatLab computer assignment is due next Thursday (Feb 15th) along with your fifth homework assignment. Stanford PC and Mac computer clusters have MatLab already installed, as do "GroupSpace" computer clusters, so you can use these public computers to complete your assignments. If you have questions about accessing or using MatLab, you are encouraged to ask friends who have already used MatLab to help you get started. Of course you are also welcome to contact your RCC representative, or your TA or instructor (or ).

Please also remember that there will be two other MatLab assignments during the quarter (due Feb 27th and Mar 15th).

The midterms have been graded, and you should now find your score posted on coursework. Here is the statistical breakdown for the test:

• Standard Deviation = 14.8
• Mode = 88
• Mean = 78.8

We are not assigning letter grades to the test, so there are no cut-offs to speak of. If you want to have a feel for how well you did on the test, you can compare your score to the statistics above or go through your exam with your TA or instructor.

Students who scored well below the average should be concerned and need to figure out what went wrong on this test. A low score on the first midterm should be thought of as a warning to start actively working to improve your understanding of the course material (attending more office hours, SUMO tutoring, asking more questions in class, etc.). However, one should not despair: if you did poorly on this midterm you can still do quite well in the class by putting in the effort and doing well on later midterms.

Your midterm is this Thursday, February 1 from 7 to 8:30. You will take the exam in a room designated by your enrollment in the course. Students registered for either Dragos Oprea's or Todor Milanov's lectures will take their exam in Cubberley Auditorium. Students registered for Nadya Shirokova's lectures will take their exam in 420-040. Students registered for Rafe Mazzeo's lectures (including ACE) will take their exam in 420-041.

You should show up 10 to 15 minutes early to find a seat. It is important that you take your exam in this exam location and not one of the other exam locations, as there will only be enough seats and exams in a given location for the assigned students. If you do not know how to get to your designated exam location, you can try searching for it at http://campus-map.stanford.edu Any other questions can be directed to either or your instructor.

Your first midterm will be next Thursday, February 1, from 7 to 8:30pm. Exam locations will be announced later. Students who have a valid conflict with this exam should contact their lecturer before Thursday and give their reason for not being able to attend the regular exam period. Valid excuses include having another exam at the same date and time, being a varsity athlete with an out-of-town game at the schedule exam period, or having a discussion section for another class scheduled at the same time. Only students with legitimate conflicts will be allowed to reschedule their exams, and alternate exam times are limited.

Further questions should be directed to your lecturer.

All lecture sections of Math 51 now have a coursework webpage up and running. Once you are registered for one of the lecture sections on Axess you should be able to access the associated coursework by signing in at Coursework.

You should be able to register for one of the discussion sections associated to your lecture via coursework. The possible discussion sections you can attend will appear when you log onto coursework. Be warned: once you register for a discussion section, coursework might not allow to you switch sections. If you find that you have accidently registered for the wrong discussion section and cannot switch out of it, you'll have to contact to be moved to the appropriate discussion section.

In the future you will use this coursework webpage to see your homework and exam scores, though other materials for the class (such as homework assignments and practice tests) are available on the course webpage.