FINAL
100 possible, AVG (58) sd(17) High (85) low (20)
Overall a very good showing on the final! The final exam response sheet is here (you can see the correct answers on the top line):
The final exam had two problems that caused difficulty for many of you. Neither was intended as a tricky problem, but they drew from older course material. These problems were: the I-F bond energy, and the # of isomers for the Ru complex). The I-F bond energy problem is a Born-Haber cycle. You can partially reason through the problem by noting that polar bonds are stronger than non-polar bonds. The Ru isomers problem is solvable by systematically working through by the ‘trans ligands’ book-keeping approach; and remembering that “en” is ethylenediamine.
The responses to question 21 tell me that I should add some bio-inorganic chemistry to the course next year (34% picked that option). I’ll probably use that as an avenue to teach reaction mechanisms, and drop the textbook chapter.
Exam 3: Dec 3
100 possible, (95 high, 5 low) avg = 61, SD = 20
Exam Scores here: Exam3_gradebook
As previously, I generally place the lowest B- as about AVG – 1/3SD. If the grade were determined by this individual examination, I would use these cutoffs:
A- (74); B- (54); C- (34); D- (14); F (<14).
So how many students scored in these grade-bins? A(16), B (18), C(12), D(4), F(1) non-takers (about 5! living dangerously…)
Exam II: October 28
100 possible, (100 high, 19 low) avg = 67, SD = 20
The exam was pretty reasonable statistically, but possibly bi-modal. Perhaps the class is partitioning into two populations, each with distinct averages…
Exam_II_results exam score listed by clicker ID#.
Although I set the grades by the points-total at the end of the semester, if I had to assign letter grades they are below (lowest score for the letter).
A- (> 80); B- (>60); C- (> 41); D- (> 21); F (<21)
Since this is an upper-division majors-dominated course, I generally take the lowest B- = Avg – (1/3)SD. This is approximate, but a really good starting point. So how many people had scores in each speculative letter-grade bin? Here goes: A (17); B (18); C (15); D (4); F (1).
Exam 1: October 3
100 possible, (90 high, 17 low) avg = 65, SD = 16
The exam was more challenging than expected, as my exams often have an average score ~71.
Ex1_scoresheet exam score listed by clicker ID#.
Although I set the grades by the points-total at the end of the semester, if I had to assign letter grades they are below (lowest score for the letter).
A- (> 76); B- (>60); C- (> 43); D- (> 28); F (<20)
Since this is an upper-division majors-dominated course, I generally take the lowest B- = Avg – (1/3)SD. This is approximate, but a really good starting point. So how many people had scores in each speculative letter-grade bin? Here goes: A (15); B (23); C (10); D (6); F (1).
| 20.75 | 18.87 | 18.87 | 33.96 | 7.55 |