MATH 31B
Integration and Infinite Series
Lecture and discussion. The registrar has published a final exam time.
Fall 2026: 4 lectures and 24 discussions. 4 lectures and 7 discussions are open. The oldest of these readings was 12 hours ago.
Grades
3.08
Average grade awarded in MATH 31B. Not a student rating: this is what the grades were.
In the A range
47%
of the 6,721 letter grades
D, F or W
8.3%
of every letter grade awarded, plus withdrawals
Taken pass/no pass
<1%
39% of those passed
The registrar's own records: 6,721 grades over 15 terms, Fall 2021 to Fall 2025. Every instructor is pooled here.
What is inside that record
3 of those terms are summer sessions, and summer sessions are counted here.
The table below splits them, and term averages across those 15 terms ran 2.81 to 3.77.
Historical grades for GU, HAOTIAN, across recorded terms. The course summary above includes all professors.
- A+ 18 · 8.9%
- A 57 · 28.1%
- A- 12 · 5.9%
- B+ 19 · 9.4%
- B 19 · 9.4%
- B- 16 · 7.9%
- C+ 12 · 5.9%
- C 16 · 7.9%
- C- 5 · 2.5%
- D+ 6 · 3.0%
- D 6 · 3.0%
- D- 2 · 1.0%
- F 15 · 7.4%
Percentages are of the 203 letter grades. Grey bars are non-letter outcomes.
How the non-letter outcomes are counted
They are excluded from the GPA entirely rather than scored, because counting a P as a 4.0 would be a fabrication.
By instructor
| Instructor | Predicted GPA | Raw | n | Terms | A range | Workload | Fall 2026 |
|---|---|---|---|---|---|---|---|
| SANCHEZ OCAL, PABLO reviews ↗ | 3.10 | 3.10 | 751 | 3 | 41% | light | not teaching it |
| XIONG, HAOREN reviews ↗ | 2.91 | 2.90 | 674 | 2 | 35% | light | not teaching it |
| ARANT, TYLER JAMES reviews ↗ | 2.80 | 2.80 | 601 | 3 | 39% | very light | not teaching it |
| GREENE, MARY PAIGE reviews ↗ | 3.56 | 3.57 | 551 | 4 | 74% | - | not teaching it |
| JOHNSON, CASEY LYNN reviews ↗ | 2.62 | 2.60 | 450 | 3 | 36% | light | not teaching it |
| GANNON, KYLE ANDREW COX reviews ↗ | 3.69 | 3.72 | 437 | 1 | 78% | very light | not teaching it |
| BEERS, DAVID reviews ↗ | 3.29 | 3.30 | 426 | 2 | 57% | very light | not teaching it |
| DING, CHANGYING reviews ↗ | 3.15 | 3.15 | 417 | 2 | 49% | very light | not teaching it |
| LI, LINFENG reviews ↗ | 3.19 | 3.20 | 413 | 2 | 43% | light | not teaching it |
| FLYNN, PATRICK reviews ↗ | 3.35 | 3.37 | 212 | 1 | 65% | very light | not teaching it |
| KERANEN, JUKKA PETRI MIKAEL reviews ↗ | 2.96 | 2.95 | 209 | 1 | 40% | very light | not teaching it |
| BADREDDINE, RANA reviews ↗ | 3.07 | 3.07 | 206 | 1 | 42% | - | not teaching it |
| MIN, HYUNKI reviews ↗ | 3.11 | 3.11 | 203 | 1 | 44% | very light | not teaching it |
| ZHANG, ZHAOYU reviews ↗ | 2.76 | 2.73 | 203 | 1 | 29% | very light | not teaching it |
| GU, HAOTIAN reviews ↗ | 2.92 | 2.91 | 203 | 1 | 43% | - | Open, 1 seat left |
| DEMIROGLU, YESIM reviews ↗ | 2.94 | 2.93 | 200 | 1 | 36% | - | not teaching it |
| SCAVIA, FEDERICO reviews ↗ | 3.16 | 3.17 | 197 | 1 | 49% | light | not teaching it |
| MARKS, ANDREW SCOTT reviews ↗ | 2.65 | 2.61 | 182 | 1 | 32% | very heavy | not teaching it |
| GREENE, ROBERT E reviews ↗ | 2.85 | 2.82 | 150 | 1 | 28% | average | not teaching it |
| CONLEY, WILLIAM JOSEPH reviews ↗ | 2.19 | 1.78 | 36 | 1 | 11% | average | not teaching it |
Why Predicted is not the Raw average
“Predicted” is shrunk toward the course average, which is itself shrunk toward the department, so an instructor with a handful of students sits near the course mean rather than topping the list.
Grade records describe outcomes. For what a course is like to take, read student reviews written on dibs below or follow the separate external review link.
Workload and assignments
Reported assignments across instructors and terms. This term's syllabus may differ.
What the work looks like
- 2 exams, 7 mentions in past reviews
- 3 quizzes, 3 mentions in past reviews
- Problem sets mentioned, no number given, 6 mentions in past reviews
Based on 818 reviews; source checked about 1 month ago. dibs counts only what a review actually states, so a kind of work nobody mentioned is absent rather than zero.
What comes first
The chain dibs can see is 2 courses long before MATH 31B. dibs has read a class page for every course in it.
Counted in courses rather than quarters: dibs does not know which of them a department lets you take together.
In Falls
Ran in 5 of the last 5 Falls.
From the terms dibs holds, which start in Fall 2021 and exclude summer. A department can run a course in a quarter it never has before.
From the registrar's catalog
Lecture, three hours; discussion, one hour. Requisite: course 31A with grade of C- or better. Not open for credit to students with credit for course 3B. Transcendental functions; methods and applications of integration; sequences and series. P/NP or letter grading.
Sections in Fall 2026
Choose an open discussion to enroll; an open lecture alone does not mean a seat is available.
Seat counts as of : the oldest of these 28 readings. Seat readings are snapshots, not live availability. Their timestamps show when dibs last checked.
-
Seats
Open1 seat left in discussions.
Lecture: 208 of 210 enrolled
Seat risk
high risk6 discussions, 1 open: Dis 1F, R 10:00am-10:50am.Every discussion, with its time and seats: 6 discussions
-
Closed
35 of 35 enrolled
-
Closed
35 of 35 enrolled
-
Closed
35 of 35 enrolled
-
Closed
35 of 35 enrolled
-
Closed
35 of 35 enrolled
-
Open
1 seat left.
34 of 35 enrolled
-
-
Seats
Open5 seats left in discussions.
Lecture: 137 of 140 enrolled
Seat risk
high risk6 discussions, 1 open: Dis 2D, R 1:00pm-1:50pm.Every discussion, with its time and seats: 6 discussions
-
Closed
35 of 35 · 1 over enrolled
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Closed
35 of 35 enrolled
-
Closed
35 of 35 · 1 over enrolled
-
Open
5 seats left.
30 of 35 enrolled
-
Closed by the department
no enrollment count published
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Closed by the department
no enrollment count published
-
-
Seats
Open3 seats left in discussions.
Lecture: 207 of 210 enrolled
Instructor
Wang, A.Y.
3.08Predicted GPA
Historical records across all instructors; 6,721 letter gradesSeat risk
high risk6 discussions, 2 open: Dis 3D, R 2:00pm-2:50pm, and Dis 3F, R 2:00pm-2:50pm.Every discussion, with its time and seats: 6 discussions
-
Closed
35 of 35 enrolled
-
Closed
35 of 35 enrolled
-
Closed
35 of 35 enrolled
-
Open
2 seats left.
33 of 35 enrolled
-
Closed
35 of 35 enrolled
-
Open
1 seat left.
34 of 35 enrolled
-
-
Seats
Open6 seats left in discussions.
Lecture: 204 of 210 enrolled
Instructor
Wang, A.Y.
3.08Predicted GPA
Historical records across all instructors; 6,721 letter gradesSeat risk
high risk6 discussions, 3 open: Dis 4A, T 3:00pm-3:50pm, Dis 4E, T 3:00pm-3:50pm, and Dis 4F, R 3:00pm-3:50pm.Every discussion, with its time and seats: 6 discussions
-
Open
2 seats left.
33 of 35 enrolled
-
Closed
35 of 35 enrolled
-
Closed
35 of 35 enrolled
-
Closed
35 of 35 enrolled
-
Open
3 seats left.
32 of 35 enrolled
-
Open
1 seat left.
34 of 35 enrolled
-
Final enrollment, averaged across each term's sections: between 144 and 281 a term over 12 terms, summer excluded, most recently 208 in Fall 2025. That is the shape across years, not this term, which is above.
From the people who took it
Student reviews
What taking MATH 31B was like: the work, the teaching, and what students wish they’d known.
Your experience could be the first.
No student reviews are available to read on dibs for this course yet. Took it? Tell the next person what helped, what was hard, and how you spent your time.
Looking for more perspectives?
External reviews are separate and do not count toward the dibs rating.
Seats over time in Fall 2026
How each lecture has filled since dibs first saw it. This course runs 4 lectures; the legend under the chart picks one.
A dot is a reading where something moved: the seat count, the status, or the waitlist.
What a flat run means, and where a line starts
Flat between dots means it did not drift, it held and then jumped, and a line starts when dibs first saw that lecture rather than reaching back before it existed. A lecture that has never moved draws a flat line across the whole window, and one with two or three readings draws a line joining them, which is too few to read a trend from.
Lec 1 · Gu, H. · 208 of 210 enrolled
Filled by 59 over 2 months
Lec 2 · Gu, H. · 137 of 140 enrolled
Filled by 83 over 2 months
Lec 3 · Wang, A.Y. · 207 of 210 enrolled
Filled by 74 over 2 months
Lec 4 · Wang, A.Y. · 204 of 210 enrolled
Filled by 117 over 2 months
How readings and alerts work
Dated seat counts can be available even when hourly check history is missing. Gaps do not show whether seats changed between observations.
Seat counts show the last successful read, not live availability. Refreshes can be delayed by request limits or upstream interruptions. Watched sections receive priority, but an hourly update for every section is not guaranteed.
The registrar can change a seat count between our checks. Alerts depend on dibs detecting an opening and completing delivery; a quiet watch does not prove that no seat opened. Check the registrar before enrolling.