Grade Scales for Homework and Exams
MAS 4105, Section 3247 (14242) — Linear Algebra 1
Fall 2024

The scale for each quiz or exam below is created after the quiz or exam is graded. These are the cutoffs that will inserted into the announced grading formulas to determine the "raw score" cutoffs for final grades.

The cutoffs given below are the bottom for the "flat" grade, not the minus grade. (For example, if the cutoff listed for a B is 50 points, then 50 is a B and 49 is a B-). The A- cutoff is 1/3 of the way down from the A cutoff to the B cutoff, the B+ cutoff is 1/3 of the way up from the B cutoff to the A cutoff, the B- cutoff is 1/3 of the way down from the B cutoff to the C cutoff, etc. (except that I do not give D-'s; anything lower than the D cutoff is an E).

A cutoff like "17.5" in a grade-scale does not mean that any half-points were given to any student on the corresponding assignment or exam; it simply means that I thought 18 was too high for the cutoff and 17 was too low.

Each average below, except for quiz totals, was computed from the scores of only those students who took that quiz. The average for total quiz points was computed just from currently-registered students, but averages-in zeroes for missed quizzes.


Quizzes

Scores (and cutoffs) for the different quizzes are simply added together at the end of the semester. Example: if there are only two quizzes, worth 25 points and 30 points respectively, and the "A" cutoffs are 22 and 26 respectively, then the "A" cutoff for the quiz/homework component of the final grade is 48 out of a possible 55. A student earning 24 points on each of the two quizzes would have the same homework grade as a student earning 18 points on the first assignment and 30 points on the second.

A B C D class average
Quiz 1 (20 points)
18
(90%)
16
(80%)
14
(70%)
12
(60%)
17.8
(89%)
Quiz 2 (20 points)
18
(90%)
15
(75%)
13
(65%)
10
(50%)
16.7
(83%)
Quiz 3 (20 points)
18
(90%)
15
(75%)
12
(60%)
9
(45%)
15.8
(79%)
Quiz 4 (20 points)
18
(90%)
15
(75%)
12
(60%)
10
(50%)
16.8
(84%)
Quiz 5 (20 points)
17
(85%)
15
(75%)
12
(60%)
10
(50%)
16.0
(80%)
Quiz 6 (20 points)
18
(90%)
15
(75%)
12
(60%)
10
(50%)
12.7
(64%)
Quiz 7 (20 points)
17
(85%)
14
(75%)
12
(60%)
9
(50%)
15.5
(80%)
Quiz 8 (20 points)
18
(85%)
16
(75%)
14
(60%)
12
(50%)
15.4
(80%)
Quiz totals (160 points to date) )
142
(89%)
121
(76%)
102
(64%)
82
(51%)
127
(80%)


Midterm Exams

A B C D class median class average
Exam 1 (114 points)
94.5
(83%)
80.5
(71%)
57
(50%)
39.5
(35%)
70
(61%)
61.4
(54%)
list of scores
Exam 2 (125 points)
108
(86%)
92
(74%)
67.5
(54%)
49.5
(40%)
73
(58%)
71.2
(57%)
list of scores


Current Raw-score cutoffs for each grade

See Canvas "Assignment" and syllabus for explanation. "Current" means "As of the last exam and/or quiz whose grade-scale is above."

max possible to date A A- B+ B B- C+ C C- D+ D
700 605 575 545 515 476 437 397 366 334 302

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