Carney Curve

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

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 · Political Science · Fall 2021 – Spring 2026

David Dipasquale

Political Science · 26 evaluation records across 13 classes

On each class's board
ICSP 2615only instructor on recordPOLI 10421st of 5 instructorsICSP 1199only instructor on recordPOLI 2605only instructor on record ProvisionalPOLI 2625only instructor on record ProvisionalPOLI 2638only instructor on record ProvisionalICSP 4901only instructor on record ProvisionalICSP 4906unrated · 2 instructors on record ProvisionalPOLI 2636only instructor on record ProvisionalPOLI 2637only instructor on record ProvisionalPOLI 4690only instructor on record ProvisionalPOLI 4691only instructor on record ProvisionalPOLI 4693only instructor on record Provisional
What the overall is made of
93BC evaluations26 records · weight ×1.0 · Fall 2021 – Spring 2026
90RateMyProfessors20 ratings · weight ×2.0 · 80% 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
98thMore challenging than 98% of BC instructorsranked against every one we hold
98BC — “Intellectually Challenging”26 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 86 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
91stMore work than 91% of BC instructorsranked against every one we hold
71BC — “Workload”26 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: 20 ratings, 80% would take again, difficulty 86 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 26 records
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
9569th pctl
Available Outside of ClassThe instructor was available for help outside of class.
9573rd pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9573rd pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
9681st pctl
The Course3 items
Well-Organized CourseThe course was well organized.
9264th pctl
Clear Learning GoalsThe learning objectives for the course were clear.
9262nd pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9260th pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
9380th pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
8945th pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
8838th 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.
7191st pctl
Intellectually ChallengingThe course was intellectually challenging.
9898th pctl
Attendance MattersAttending class was necessary to do well in this course.
9793rd 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

13 classes · 26 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.

ICSP 2615 Islam and Liberal DemocracyOvr94Chal92ndWork81st
On this class's boardonly instructor on record

5 sections on record · course itself rated 91 out of 100. See the full board for ICSP 2615.

TermSecInstrCourseWork
Fall 202501938980
Fall 202401959160
Fall 2023019797
Fall 202201908960
Fall 202101959260
All 13 items for ICSP 2615
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.
9562nd pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9562nd pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
9880th pctl
The Course3 items
Well-Organized CourseThe course was well organized.
9465th pctl
Clear Learning GoalsThe learning objectives for the course were clear.
9464th pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9783rd pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
9367th pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
8626th pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
8727th 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.
6581st pctl
Intellectually ChallengingThe course was intellectually challenging.
9892nd pctl
Attendance MattersAttending class was necessary to do well in this course.
9990th 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.

POLI 1042 Introduction to Modern PoliticsOvr95Chal91stWork85th
On this class's board1st of 5 instructors

5 sections on record · course itself rated 91 out of 100. See the full board for POLI 1042.

TermSecInstrCourseWork
Spring 202601999480
Fall 202501949060
Fall 2023019585
Fall 202201918960
Fall 202101959580
All 13 items for POLI 1042
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
9669th pctl
Available Outside of ClassThe instructor was available for help outside of class.
9237th 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.
9878th pctl
The Course3 items
Well-Organized CourseThe course was well organized.
9679th pctl
Clear Learning GoalsThe learning objectives for the course were clear.
9575th pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9676th pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
9363rd pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
8936th pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
8418th 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.
7085th pctl
Intellectually ChallengingThe course was intellectually challenging.
9891st pctl
Attendance MattersAttending class was necessary to do well in this course.
9888th 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.

ICSP 1199 Islamic CivilizationOvr98Chal100thWork93rd
On this class's boardonly instructor on record

3 sections on record · course itself rated 94 out of 100. See the full board for ICSP 1199.

TermSecInstrCourseWork
Fall 2023019793
Fall 202201979480
Fall 2021011009480
All 13 items for ICSP 1199
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
9778th 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.
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.
9991st pctl
Clear Learning GoalsThe learning objectives for the course were clear.
9992nd 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.
9992nd 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.
9675th 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.
8093rd pctl
Intellectually ChallengingThe course was intellectually challenging.
100100th pctl
Attendance MattersAttending class was necessary to do well in this course.
9989th 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.

POLI 2605 The Architecture of PowerOvr94Chal93rdWork85th
On this class's boardonly instructor on record Provisional

2 sections on record · course itself rated 90 out of 100. See the full board for POLI 2605.

TermSecInstrCourseWork
Spring 202501949080
Spring 202301949060
All 13 items for POLI 2605
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.
9777th pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9774th pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
9983rd pctl
The Course3 items
Well-Organized CourseThe course was well organized.
9256th pctl
Clear Learning GoalsThe learning objectives for the course were clear.
9358th pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9570th pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
9681st pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
9040th pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
8829th 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.
7085th pctl
Intellectually ChallengingThe course was intellectually challenging.
9993rd pctl
Attendance MattersAttending class was necessary to do well in this course.
100100th 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.

POLI 2625 Islam, the Muslim World, and Democratic PoliticsOvr65Chal84thWork100th
On this class's boardonly instructor on record Provisional

2 sections on record · course itself rated 38 out of 100. See the full board for POLI 2625.

TermSecInstrCourseWork
Summer 2025026740100
Summer 2022016435100
All 13 items for POLI 2625
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
794th 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.
762nd pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
814th pctl
The Course3 items
Well-Organized CourseThe course was well organized.
621st pctl
Clear Learning GoalsThe learning objectives for the course were clear.
671st pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
660th pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
753rd pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
7910th pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
722nd 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.
100100th pctl
Intellectually ChallengingThe course was intellectually challenging.
9684th pctl
Attendance MattersAttending class was necessary to do well in this course.
787th 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.

POLI 2638 Islamic Political PhilosophyOvr98Chal93rdWork85th
On this class's boardonly instructor on record Provisional

2 sections on record · course itself rated 94 out of 100. See the full board for POLI 2638.

TermSecInstrCourseWork
Spring 202501989760
Spring 202201989080
All 13 items for POLI 2638
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.
9881st pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9988th pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
9985th pctl
The Course3 items
Well-Organized CourseThe course was well organized.
9992nd pctl
Clear Learning GoalsThe learning objectives for the course were clear.
9993rd 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.
9786th 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.
9356th 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.
7085th pctl
Intellectually ChallengingThe course was intellectually challenging.
9993rd pctl
Attendance MattersAttending class was necessary to do well in this course.
100100th 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.

ICSP 4901 Readings and ResearchOvrChalWork
On this class's boardonly instructor on record Provisional

1 section on record · course itself rated — out of 100. See the full board for ICSP 4901.

TermSecInstrCourseWork
Spring 202601
All 13 items for ICSP 4901

Nothing reported

None of the evaluation questions were reported for these records.

ICSP 4906 Advanced Independent Research IIOvrChalWork
On this class's boardunrated · 2 instructors on record Provisional

1 section on record · course itself rated — out of 100. See the full board for ICSP 4906.

TermSecInstrCourseWork
Spring 202602
All 13 items for ICSP 4906

Nothing reported

None of the evaluation questions were reported for these records.

POLI 2636 Medieval Jewish and Christian Political PhilosophyOvr97Chal100thWork78th
On this class's boardonly instructor on record Provisional

1 section on record · course itself rated 91 out of 100. See the full board for POLI 2636.

TermSecInstrCourseWork
Spring 202401979160
All 13 items for POLI 2636
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
100100th pctl
Available Outside of ClassThe instructor was available for help outside of class.
100100th 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.
100100th pctl
The Course3 items
Well-Organized CourseThe course was well organized.
9150th pctl
Clear Learning GoalsThe learning objectives for the course were clear.
8933rd pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9462nd pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
100100th 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.
100100th 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.
100100th pctl
Attendance MattersAttending class was necessary to do well in this course.
100100th 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.

POLI 2637 Introduction to Islamic LawOvr99Chal93rdWork78th
On this class's boardonly instructor on record Provisional

1 section on record · course itself rated 95 out of 100. See the full board for POLI 2637.

TermSecInstrCourseWork
Spring 202401999560
All 13 items for POLI 2637
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
100100th pctl
Available Outside of ClassThe instructor was available for help outside of class.
9455th pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9987th pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
100100th pctl
The Course3 items
Well-Organized CourseThe course was well organized.
9992nd pctl
Clear Learning GoalsThe learning objectives for the course were clear.
100100th pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9678th pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
9889th pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
9573rd pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
9466th 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.
9993rd pctl
Attendance MattersAttending class was necessary to do well in this course.
9989th 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.

POLI 4690 The Political Philosophy of AlfarabiOvr95Chal100thWork78th
On this class's boardonly instructor on record Provisional

1 section on record · course itself rated 95 out of 100. See the full board for POLI 4690.

TermSecInstrCourseWork
Spring 202201959560
All 13 items for POLI 4690
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.
100100th pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9562nd pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
9555th pctl
The Course3 items
Well-Organized CourseThe course was well organized.
9573rd pctl
Clear Learning GoalsThe learning objectives for the course were clear.
9042nd pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9033rd pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
9578th 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.
9571st 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.
100100th pctl
Attendance MattersAttending class was necessary to do well in this course.
100100th 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.

POLI 4691 Philosophies of Plato and AristotleOvr93Chal56thWork
On this class's boardonly instructor on record Provisional

1 section on record · course itself rated 90 out of 100. See the full board for POLI 4691.

TermSecInstrCourseWork
Spring 2023019390
All 13 items for POLI 4691
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
8923rd pctl
Available Outside of ClassThe instructor was available for help outside of class.
8920th pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
9138th pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
9131st pctl
The Course3 items
Well-Organized CourseThe course was well organized.
9150th pctl
Clear Learning GoalsThe learning objectives for the course were clear.
8933rd pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
8614th pctl
Assignments & Feedback2 items
Assignments Help You LearnAssignments and exams contributed to my learning.
8935th pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
8010th pctl
Workload, difficulty & attendanceNot ratings
Intellectually ChallengingThe course was intellectually challenging.
9156th pctl
Attendance MattersAttending class was necessary to do well in this course.
9148th 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. 2 of 13 questions were not reported and are left out rather than shown as zero.

POLI 4693 Islamic PlatonismOvr100Chal100thWork78th
On this class's boardonly instructor on record Provisional

1 section on record · course itself rated 94 out of 100. See the full board for POLI 4693.

TermSecInstrCourseWork
Spring 2026011009460
All 13 items for POLI 4693
The Professor4 items
Clearly Explains MaterialThe instructor was effective at creating an understanding of difficult subject matter.
9454th pctl
Available Outside of ClassThe instructor was available for help outside of class.
100100th pctl
Brings Out Your Best WorkThe instructor motivated me to do my best work.
100100th pctl
Sparked My InterestThe course stimulated my interest in the subject matter.
100100th pctl
The Course3 items
Well-Organized CourseThe course was well organized.
9785th pctl
Clear Learning GoalsThe learning objectives for the course were clear.
9468th pctl
Useful Beyond the CourseWhat I learned is applicable beyond this course.
9462nd pctl
Assignments & Feedback3 items
Assignments Help You LearnAssignments and exams contributed to my learning.
9788th pctl
Gives Feedback PromptlyI received feedback on my work in a timely manner.
9151st pctl
Meaningful FeedbackThe feedback I received on my work was meaningful.
9466th 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.
100100th pctl
Attendance MattersAttending class was necessary to do well in this course.
9783rd 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.