Elementary Math Models -- Fall 2017
Results for Exam 1
This webpage will give an overview of how the class performed as a
whole on the exam. Further down, there are also some comments
about how items were graded. Please read them carefully.
If you are dissatisfied
with your performance on the exam, please make an appointment to see
me. Bring your exam and portfolio to the meeting, and I may
be able to suggest ways to make
your preparations more effective for the remaining exams. And I am open
to any suggestions about how I can make the course more supportive of
You can find your individual score posted on Blackboard. When you
get the exam back in class, double check that the score on your paper
is the same as what is recorded on blackboard. Also, add up your
points for the entire exam and double check that I have the right total
for your paper. I am very careful totalling and recording scores,
but mistakes CAN occur.
Class Performance. The histogram below shows all of the
scores for the first exam. The scores are rounded to the
nearest whole number, and rounded up
in case of a tie. So if you got an 86.5 that would appear as an
on the graph. The graph shows, for example, that one student
scored highest with a 99, 8 students
scored 95 or above, and over 2/3 of the class (19 out of 28) scored in
the 90s. At
this point everyone is on track to
B or better
in the course. However, scores will almost certainly be lower for
exams, as we progress to more difficult material. If
you scored below 85, you should probably
be thinking about ways to improve. It might
be a good ideas to come see me in my office in the next week or so to
discuss your portfolio and
the exam results.
Comments On Grading Scale.
I assign partial credit on each part of each problem based on a
traditional 90/80/70/60 grading system. That is, if I think an
answer deserves a B grade I will assign between 80 and 90 percent of
the points. If you receive less than 70% on any problem, that is
my indication to you of unsatisfactory mastery of that material.
If you score less than 60% that is an indication of a failing grade for
that item. Even items that are left blank generally receive some
credit, perhaps 40%, so that these items do not overly drag down the
For the first page there were two types of questions. For 2 and
5, where you know that there is one correct answer, you receive 50%
credit for any incorrect answer and 100% for the correct answer.
For the remaining questions each of the options is essentially a
true/false item, and you lost 3/4 of a point for any item that is
wrong, either because you marked it true when it was false, or the
opposite. The grading may not make it clear what the correct
answer(s) are. That is intentional. Students should try to
figure that out as part of the group project.
Finally, note that I do not use a rigid predefined grading scale.
At the end of the course I want to be able to adjust the cutoffs up or
down so that students with nearly equal scores receive the same letter
grade, as far as possible. Because of the way partial credit is
assigned, the cutoffs will be close to the traditional 90/80/70/60
marks. Usually the breakdown is something close to 93 - 100 A,
90-92 A-, 88-89 B+, 83-87 B, 80-82 B-, 78-79 C+, 73-77 C, 70-72C-,
60-69 D, < 60 F.