Main Handout: Grading

Physics 132, Spring 2012

Prof. E. F. Redish

Non-Honors Section

Grades in this class arise NOT solely from your performance on exams but from a mix of many different ways to judge your work. Be sure you understand the components so you don't get a nasty surprise at the end of the term!

The result is a grade that is a more accurate representation of your performance in the class. It also means that you can blow one midterm exam and still get an A if your work in other categories is first rate! Here is the breakdown.

• Components --
  
  

  Hour exams (100 pts each)	200
  Quizzes (may be less)	100
  Final exam (200 pts)	200
  Homework (scaled to)	250
  Lab (scaled to)	200
  Participation (approximately)	100
  Total	1050

  These divisions are not guaranteed. We adjust as the term goes on depending on circumstances -- snow, tornadoes, etc.

• How grades are assigned -- I assign a grade level for each category (e.g., how many points you need to get to get an A on the quizzes, what you need to get an A on the HW, etc.) and then add them up to get a grade level for what is need for each final grade.
  
  
• Curving: Labs and HW yes, exams and quizzes no -- For exams, I do NOT grade on a curve. I have an absolute expectation. On most exams, 75% will be an A, 60% a B, 45% a C. (Please DON'T try to convert this to the --also arbitrary-- 70%/80%/90% scale used in some other classes. This will confuse both you and me.) This means that someone else's doing well on an exam will never negatively affect your grade. If you all do well on an exam I will give you all A's for that exam.
  
  
• Overall grades -- From past experience with this level class, I expect that an A will require about (80± 3)%, a B will require about (70 ± 3)% and a C will require about (60 ± 3)% of the total points in the class. Passing (not getting an F) will require about (45 ± 3)%. The "±" reflects my best guess. This means the odds are 2:1 that the boundary between an A and a B will be somewhere between 77% and 83%. It is not a guarantee. These grades reflect that the averages on the homework and labs tend to be higher than on the exams.
  
  
• The escape clause -- There is an "escape clause" for final grades: If you are below the total needed for a grade but are within 25 points and you are in the next grade up in both homework and the final, I will give you the next grade up (with a minus). This gives these two activities a slightly more important role in the class than the rest and reflects my perception that homework is the most important part of the class and the final gives an overall summary of how well you have done overall. If you are within 25 points of the next grade up but don't have that grade in both the homework and final I will add a plus to your grade. [Note that this means that someone with fewer total points might get an A- will someone with a few more total points could get a B+. Please do not bother to complain about this.]

Honors Section

The only difference between the non-honors and honors section is that the honors students will also write a term paper. Yes, if you expect to get honors credit for the class, you will have to do more work!

If you are signed up for the honors section but decide you do NOT want honors credit, we will be able to change your registration after classes start.

• The Term Paper --

For honors credit you will have to write a 10-20 page paper during the semester. You will be expected to (by negotiation with the instructor) come up with a reasonable topic that demonstrates a use of physics in biology. (I have a list of possible topics available.) For the paper you will have to

• Read at least one paper in the research literature that uses physics in biology;
• Describe briefly (in a way that a physicist can understand) the biology involved;
• Describe briefly (in a way that a biologist can understand) the physics involved;
• Propose and solve a physics problem that is comparable to a bio-based physics problem used in this class.

A few weeks into the term you will meet with the instructor to decide on a project and find an advisor who can answer your questions on the topic. You will be expected to produce two (short -- one page) progress reports during the term and to meet with the instructor once to discuss your project.

• Components of the Honors Grade --

Your grade includes more points than the rest of the class since you will be writing a term paper. Your total grade will be placed on the same scale as the rest of the class after scaling back by a factor of 1150/1050.

The paper will be due as an electronic attachment to an email sent to me no later than Monday, 5/14. The paper should describe some physics that we did not cover this term and give a biological application of it. You should create a problem on your topic equivalent to one of our "paper" problems and solve it. My rubric for grading the paper (on a 100 point scale) will be as follows:

1. Description of the physics your are using. (25 pts)
2. Description of the biology. (25 pts)
3. Showing how they fit together. (10 pts)
4. Clarity and coherence of presentation. (10 pts)
5. Correctness of the science (points off for errors up to) (10 pts)
6. Quality of the problem and effectiveness in bringing the physics and biology together (10 pts)
7. Quality of presentation (layout, spelling and grammar, etc.) (10 pts)

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Last revision 14 January, 2012.