Carney Curve

Boston College course evaluations · every published number, ranked class by class

Top of the board1.ECON 9902962.LAWS 8856973.PRTO 3300984.BSLW 2299975.PHIL 4932986.LAWS 8308987.SCWK 9960998.EESC 99011009.MUSP 16609610.UGMG 10109811.UNCP 55119712.SCWK 883197

Positions account for how many records stand behind each number, so one perfect review does not outrank a semester of them. Every score shown is the real average — only the ordering is adjusted.

Instructor record · Engineering · Spring 2022 – Spring 2026

Siddhartan Govindasamy

Professor, Sabet Family Dean's Faculty Fellow; Interim Department Chair · Engineering · 28 evaluation records across 11 classes

On each class's board
ENGR 21021st of 3 instructorsENGR 31001st of 5 instructorsENGR 41021st of 3 instructorsENGR 41031st of 4 instructorsENGR 11021st of 4 instructors ProvisionalENGR 11051st of 3 instructors ProvisionalENGR 47042nd of 2 instructors ProvisionalENGR 47051st of 2 instructors ProvisionalCSCI 33901st of 4 instructors ProvisionalENGR 31031st of 2 instructors ProvisionalENGR 4390only instructor on record Provisional
What the overall is made of
95BC evaluations28 records · weight ×1.0 · Spring 2022 – Spring 2026
100RateMyProfessors5 ratings · weight ×2.0 · 100% would take again
—Student reviewsno reviews — does not contribute

Sources are averaged by how much we trust each one and by how many records sit behind it, so a handful of reviews nudges the number rather than replacing it.

What the challenge rank is made of
61stMore challenging than 61% of BC instructorsranked against every one we hold
90BC — “Intellectually Challenging”28 records · raw score out of 100

Boston College's own “intellectually challenging” question — students answer it positively about courses that stretched them, so it measures intellectual challenge and NOT grading, workload or quality. Almost every BC class scores high on it, which is why it is shown as a rank rather than a score. RateMyProfessors separately rates this instructor 48 out of 100 for difficulty — that IS a difficulty measure, but it is about the person across everything they teach, not about any one class, so it is shown here rather than folded into the number above.

What the workload rank is made of
52ndMore work than 52% of BC instructorsranked against every one we hold
53BC — “Workload”28 records · raw score out of 100

Boston College reports workload as one of five bands, not as a number of hours, and it does not publish what the bands mean — so this site will not translate it into hours. Higher means more work, which is not the same as worse.

Ratings from outside BC

Not evaluation data

Collected from RateMyProfessors, not from Boston College: 5 ratings, 100% would take again, difficulty 48 out of 100. Difficulty is not a quality signal in either direction — a harder course is not a worse one.

Anyone can post there — no @bc.edu check and no enrolment check — so it is weighted alongside the evaluation data, never above it.

The line

All 13 items · means across 28 records
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
9680th pctl
Available Outside of ClassThe instructor was available for help outside of class.
9679th pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9680th pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
9573rd pctl
The Course3 items
Well-Organized CourseThe course was well organized.
8631st pctl
Clear Learning GoalsThe learning objectives for the course were clear.
8943rd pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9263rd pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
8847th pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
9049th pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
9157th pctl
Workload, difficulty & attendanceNot ratings
WorkloadHow much work the course took outside class, on Boston College's five-band scale — the band boundaries are not published, so this is not a number of hours.
5352nd pctl
Intellectually ChallengingThe course was intellectually challenging.
9061st pctl
Attendance MattersAttending class was necessary to do well in this course.
8425th pctl

Bar length is the rank against every comparable record we hold, not the raw score: BC's questions all have a median around 4.5, so a raw-scale bar would be nearly full on every row and would tell you nothing. Every bar is one ink colour — nothing here is graded green or red. The hatched bars are not ratings at all: a higher number on either describes a different course, not a better one.

Class by class

11 classes · 28 sections

How each position is worked outPositions account for how many records stand behind each number, so one perfect review does not outrank a semester of them. Every score shown is the real average — only the ordering is adjusted.

ENGR 2102 Engineering Foundations Studio IIOvr96Chal62ndWork39th
On this class's board1st of 3 instructors

6 sections on record · course itself rated 87 out of 100. See the full board for ENGR 2102.

TermSecInstrCourseWork
Fall 202401968240
Fall 2024021009260
Fall 2023019785—
Fall 2023029385—
Fall 202201928860
Fall 2022021009140
All 13 items for ENGR 2102
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
9886th pctl
Available Outside of ClassThe instructor was available for help outside of class.
9886th pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9778th pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
9773rd pctl
The Course3 items
Well-Organized CourseThe course was well organized.
9575th pctl
Clear Learning GoalsThe learning objectives for the course were clear.
9469th pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9351st pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
9579th pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
9146th pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
9462nd pctl
Workload, difficulty & attendanceNot ratings
WorkloadHow much work the course took outside class, on Boston College's five-band scale — the band boundaries are not published, so this is not a number of hours.
5039th pctl
Intellectually ChallengingThe course was intellectually challenging.
9262nd pctl
Attendance MattersAttending class was necessary to do well in this course.
9250th pctl

Bar length is the rank against every comparable record we hold, not the raw score: BC's questions all have a median around 4.5, so a raw-scale bar would be nearly full on every row and would tell you nothing. Every bar is one ink colour — nothing here is graded green or red. The hatched bars are not ratings at all: a higher number on either describes a different course, not a better one.

ENGR 3100 Collaborative Service Engineering ProjectOvr97Chal58thWork81st
On this class's board1st of 5 instructors

5 sections on record · course itself rated 90 out of 100. See the full board for ENGR 3100.

TermSecInstrCourseWork
Summer 202502100100—
Spring 202502887840
Summer 202402100100100
Spring 2024021008460
Spring 2024039688—
All 13 items for ENGR 3100
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
9670th pctl
Available Outside of ClassThe instructor was available for help outside of class.
9670th pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9670th pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
9666th pctl
The Course3 items
Well-Organized CourseThe course was well organized.
8626th pctl
Clear Learning GoalsThe learning objectives for the course were clear.
9037th pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9675th pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
9046th pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
9256th pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
9253rd pctl
Workload, difficulty & attendanceNot ratings
WorkloadHow much work the course took outside class, on Boston College's five-band scale — the band boundaries are not published, so this is not a number of hours.
6781st pctl
Intellectually ChallengingThe course was intellectually challenging.
9258th pctl
Attendance MattersAttending class was necessary to do well in this course.
9361st pctl

Bar length is the rank against every comparable record we hold, not the raw score: BC's questions all have a median around 4.5, so a raw-scale bar would be nearly full on every row and would tell you nothing. Every bar is one ink colour — nothing here is graded green or red. The hatched bars are not ratings at all: a higher number on either describes a different course, not a better one.

ENGR 4102 Senior Impact ProjectOvr90Chal18thWork78th
On this class's board1st of 3 instructors

3 sections on record · course itself rated 66 out of 100. See the full board for ENGR 4102.

TermSecInstrCourseWork
Fall 202501926560
Fall 202502937860
Fall 202401865660
All 13 items for ENGR 4102
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
9240th pctl
Available Outside of ClassThe instructor was available for help outside of class.
9132nd pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9243rd pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
9027th pctl
The Course3 items
Well-Organized CourseThe course was well organized.
682nd pctl
Clear Learning GoalsThe learning objectives for the course were clear.
753rd pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
8719th pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
774th pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
8216th pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
8316th pctl
Workload, difficulty & attendanceNot ratings
WorkloadHow much work the course took outside class, on Boston College's five-band scale — the band boundaries are not published, so this is not a number of hours.
6078th pctl
Intellectually ChallengingThe course was intellectually challenging.
8418th pctl
Attendance MattersAttending class was necessary to do well in this course.
754th pctl

Bar length is the rank against every comparable record we hold, not the raw score: BC's questions all have a median around 4.5, so a raw-scale bar would be nearly full on every row and would tell you nothing. Every bar is one ink colour — nothing here is graded green or red. The hatched bars are not ratings at all: a higher number on either describes a different course, not a better one.

ENGR 4103 Senior Impact ProjectOvr96Chal64thWork87th
On this class's board1st of 4 instructors

3 sections on record · course itself rated 79 out of 100. See the full board for ENGR 4103.

TermSecInstrCourseWork
Spring 202601977280
Spring 20260210010060
Spring 202501906380
All 13 items for ENGR 4103
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
9561st pctl
Available Outside of ClassThe instructor was available for help outside of class.
9559th pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9671st pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
9551st pctl
The Course3 items
Well-Organized CourseThe course was well organized.
755th pctl
Clear Learning GoalsThe learning objectives for the course were clear.
8622nd pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9352nd pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
796th pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
9044th pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
9148th pctl
Workload, difficulty & attendanceNot ratings
WorkloadHow much work the course took outside class, on Boston College's five-band scale — the band boundaries are not published, so this is not a number of hours.
7387th pctl
Intellectually ChallengingThe course was intellectually challenging.
9364th pctl
Attendance MattersAttending class was necessary to do well in this course.
580th pctl

Bar length is the rank against every comparable record we hold, not the raw score: BC's questions all have a median around 4.5, so a raw-scale bar would be nearly full on every row and would tell you nothing. Every bar is one ink colour — nothing here is graded green or red. The hatched bars are not ratings at all: a higher number on either describes a different course, not a better one.

ENGR 1102 Physical Modeling and Analysis LabOvr95Chal37thWork25th
On this class's board1st of 4 instructors Provisional

2 sections on record · course itself rated 88 out of 100. See the full board for ENGR 1102.

TermSecInstrCourseWork
Fall 2023019890—
Fall 202201938540
All 13 items for ENGR 1102
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
9882nd pctl
Available Outside of ClassThe instructor was available for help outside of class.
9666th pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9667th pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
9343rd pctl
The Course3 items
Well-Organized CourseThe course was well organized.
9251st pctl
Clear Learning GoalsThe learning objectives for the course were clear.
8832nd pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9673rd pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
9148th pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
8114th pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
8010th pctl
Workload, difficulty & attendanceNot ratings
WorkloadHow much work the course took outside class, on Boston College's five-band scale — the band boundaries are not published, so this is not a number of hours.
4025th pctl
Intellectually ChallengingThe course was intellectually challenging.
8837th pctl
Attendance MattersAttending class was necessary to do well in this course.
8419th pctl

Bar length is the rank against every comparable record we hold, not the raw score: BC's questions all have a median around 4.5, so a raw-scale bar would be nearly full on every row and would tell you nothing. Every bar is one ink colour — nothing here is graded green or red. The hatched bars are not ratings at all: a higher number on either describes a different course, not a better one.

ENGR 1105 Engineering Computation and ProgrammingOvr95Chal60thWork25th
On this class's board1st of 3 instructors Provisional

2 sections on record · course itself rated 86 out of 100. See the full board for ENGR 1105.

TermSecInstrCourseWork
Spring 202301957840
Spring 202201959340
All 13 items for ENGR 1105
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
9562nd pctl
Available Outside of ClassThe instructor was available for help outside of class.
9775th pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9455th pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
9449th pctl
The Course3 items
Well-Organized CourseThe course was well organized.
9149th pctl
Clear Learning GoalsThe learning objectives for the course were clear.
9250th pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9034th pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
9361st pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
8835th pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
9039th pctl
Workload, difficulty & attendanceNot ratings
WorkloadHow much work the course took outside class, on Boston College's five-band scale — the band boundaries are not published, so this is not a number of hours.
4025th pctl
Intellectually ChallengingThe course was intellectually challenging.
9260th pctl
Attendance MattersAttending class was necessary to do well in this course.
8520th pctl

Bar length is the rank against every comparable record we hold, not the raw score: BC's questions all have a median around 4.5, so a raw-scale bar would be nearly full on every row and would tell you nothing. Every bar is one ink colour — nothing here is graded green or red. The hatched bars are not ratings at all: a higher number on either describes a different course, not a better one.

ENGR 4704 Senior Year Human-Centered Engineering Reflection 1Ovr94Chal19thWork0th
On this class's board2nd of 2 instructors Provisional

2 sections on record · course itself rated 79 out of 100. See the full board for ENGR 4704.

TermSecInstrCourseWork
Fall 202501958220
Fall 202502927620
All 13 items for ENGR 4704
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
9666th pctl
Available Outside of ClassThe instructor was available for help outside of class.
9667th pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9564th pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
9664th pctl
The Course3 items
Well-Organized CourseThe course was well organized.
8938th pctl
Clear Learning GoalsThe learning objectives for the course were clear.
9038th pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9139th pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
8936th pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
9358th pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
9357th pctl
Workload, difficulty & attendanceNot ratings
WorkloadHow much work the course took outside class, on Boston College's five-band scale — the band boundaries are not published, so this is not a number of hours.
200th pctl
Intellectually ChallengingThe course was intellectually challenging.
8419th pctl
Attendance MattersAttending class was necessary to do well in this course.
8213th pctl

Bar length is the rank against every comparable record we hold, not the raw score: BC's questions all have a median around 4.5, so a raw-scale bar would be nearly full on every row and would tell you nothing. Every bar is one ink colour — nothing here is graded green or red. The hatched bars are not ratings at all: a higher number on either describes a different course, not a better one.

ENGR 4705 Senior Year Human-Centered Engineering Reflection 2Ovr97Chal12thWork0th
On this class's board1st of 2 instructors Provisional

2 sections on record · course itself rated 84 out of 100. See the full board for ENGR 4705.

TermSecInstrCourseWork
Spring 202601978620
Spring 2026029682—
All 13 items for ENGR 4705
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
9882nd pctl
Available Outside of ClassThe instructor was available for help outside of class.
9886th pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9885th pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
9882nd pctl
The Course3 items
Well-Organized CourseThe course was well organized.
9043rd pctl
Clear Learning GoalsThe learning objectives for the course were clear.
9254th pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9034th pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
8726th pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
9784th pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
9783rd pctl
Workload, difficulty & attendanceNot ratings
WorkloadHow much work the course took outside class, on Boston College's five-band scale — the band boundaries are not published, so this is not a number of hours.
200th pctl
Intellectually ChallengingThe course was intellectually challenging.
8212th pctl
Attendance MattersAttending class was necessary to do well in this course.
8521st pctl

Bar length is the rank against every comparable record we hold, not the raw score: BC's questions all have a median around 4.5, so a raw-scale bar would be nearly full on every row and would tell you nothing. Every bar is one ink colour — nothing here is graded green or red. The hatched bars are not ratings at all: a higher number on either describes a different course, not a better one.

CSCI 3390 Topics in Computer Science: Wireless and Mobile NetworksOvr96Chal57thWork78th
On this class's board1st of 4 instructors Provisional

1 section on record · course itself rated 89 out of 100. See the full board for CSCI 3390.

TermSecInstrCourseWork
Spring 202201968960
All 13 items for CSCI 3390
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
9666th pctl
Available Outside of ClassThe instructor was available for help outside of class.
9883rd pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9560th pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
9444th pctl
The Course3 items
Well-Organized CourseThe course was well organized.
9464th pctl
Clear Learning GoalsThe learning objectives for the course were clear.
9571st pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9566th pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
9786th pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
9569th pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
9781st pctl
Workload, difficulty & attendanceNot ratings
WorkloadHow much work the course took outside class, on Boston College's five-band scale — the band boundaries are not published, so this is not a number of hours.
6078th pctl
Intellectually ChallengingThe course was intellectually challenging.
9257th pctl
Attendance MattersAttending class was necessary to do well in this course.
8521st pctl

Bar length is the rank against every comparable record we hold, not the raw score: BC's questions all have a median around 4.5, so a raw-scale bar would be nearly full on every row and would tell you nothing. Every bar is one ink colour — nothing here is graded green or red. The hatched bars are not ratings at all: a higher number on either describes a different course, not a better one.

ENGR 3103 Advanced Math for EngineersOvr99Chal56thWork78th
On this class's board1st of 2 instructors Provisional

1 section on record · course itself rated 90 out of 100. See the full board for ENGR 3103.

TermSecInstrCourseWork
Spring 202501999060
All 13 items for ENGR 3103
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
9883rd pctl
Available Outside of ClassThe instructor was available for help outside of class.
9779th pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9564th pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
9879th pctl
The Course3 items
Well-Organized CourseThe course was well organized.
9468th pctl
Clear Learning GoalsThe learning objectives for the course were clear.
9468th pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9248th pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
9891st pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
9467th pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
9677th pctl
Workload, difficulty & attendanceNot ratings
WorkloadHow much work the course took outside class, on Boston College's five-band scale — the band boundaries are not published, so this is not a number of hours.
6078th pctl
Intellectually ChallengingThe course was intellectually challenging.
9156th pctl
Attendance MattersAttending class was necessary to do well in this course.
9466th pctl

Bar length is the rank against every comparable record we hold, not the raw score: BC's questions all have a median around 4.5, so a raw-scale bar would be nearly full on every row and would tell you nothing. Every bar is one ink colour — nothing here is graded green or red. The hatched bars are not ratings at all: a higher number on either describes a different course, not a better one.

ENGR 4390 Digital Signal ProcessingOvr93Chal91stWork78th
On this class's boardonly instructor on record Provisional

1 section on record · course itself rated 87 out of 100. See the full board for ENGR 4390.

TermSecInstrCourseWork
Fall 202501938760
All 13 items for ENGR 4390
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
9456th pctl
Available Outside of ClassThe instructor was available for help outside of class.
9240th pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9667th pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
9449th pctl
The Course3 items
Well-Organized CourseThe course was well organized.
9363rd pctl
Clear Learning GoalsThe learning objectives for the course were clear.
9363rd pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9356th pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
9259th pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
8421st pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
8935th pctl
Workload, difficulty & attendanceNot ratings
WorkloadHow much work the course took outside class, on Boston College's five-band scale — the band boundaries are not published, so this is not a number of hours.
6078th pctl
Intellectually ChallengingThe course was intellectually challenging.
9891st pctl
Attendance MattersAttending class was necessary to do well in this course.
8935th pctl

Bar length is the rank against every comparable record we hold, not the raw score: BC's questions all have a median around 4.5, so a raw-scale bar would be nearly full on every row and would tell you nothing. Every bar is one ink colour — nothing here is graded green or red. The hatched bars are not ratings at all: a higher number on either describes a different course, not a better one.

How to read this pageScores are out of 100 — Boston College's 1–5 agreement scale, ×20, the way these numbers were printed for years. Almost every class scores high on that scale (the median is about 90), so challenge and workload are shown as a rank against every instructor we hold rather than as a score; the raw figure is in the breakdown above. Neither describes quality, and neither is ever marked better or worse anywhere on this site. A dash means the question was not reported, and is never a zero. The position printed against each class is this instructor's place on that class's own board, computed from the same records the board itself is built from.