You are looking at Summer Session C 2026. That term is over, so these are last term's numbers rather than seats you can take. dibs holds 3 sections for Summer Session C 2026, read about 1 month ago. Separately, it has finished 400 of the 3,617 courses on its current checking list for this term. Future-term coverage is incomplete, so a course with nothing here may simply not have been reached yet. Back to Fall 2026

MATH 31B / LI, LINFENG

Integration and Infinite Series

How MATH 31B grades when LI, LINFENG teaches it. MATH 31B, every instructor LI, LINFENG, every course

Grades, this instructor

3.19adjusted historical GPA, this instructor

413 letter grades across 2 terms, Fall 2023 to Winter 2024. The course pools every instructor at 3.08 over 6,721 letter grades.

Raw average: 3.20; The mean of this instructor's recorded letter grades in this course.
In the A range: 42.9%; A+, A and A minus out of 413 letter grades.
D, F or W: 1.9%; D-range and F grades plus withdrawals, divided by letter grades plus withdrawals.
Taken pass/no pass: 0%; No pass/no-pass outcomes are recorded.

Grade distribution

A+9 / 2.2%
A103 / 24.9%
A-65 / 15.7%
B+60 / 14.5%
B59 / 14.3%
B-35 / 8.5%
C+36 / 8.7%
C32 / 7.7%
C-6 / 1.5%
D+3 / 0.7%
D1 / 0.2%
D-0 / 0%
F4 / 1%
I2 of 415

Percentages are of the 413 letter grades. Grey bars are non-letter outcomes: incompletes (I). They are excluded from GPA.

Term by term

Raw averages for the terms in this record. A missing term does not establish that this instructor did not teach it. Summer sessions are included when present.

Dashed line: course average across all instructors, 3.08.

One recorded instructorCo-taught, grades shared

Fall 20233.28213 letter grades.

Winter 20243.10200 letter grades.

Is one term a guide to the next?

Across the measured corpus, the same course and instructor's term averages were strongly correlated, including terms several years apart. That is why the adjustment does not weight recent terms more heavily. This is a dataset-wide pattern, not a promise about this instructor's next class.

Teaching it in Summer Session C 2026

This term has ended. Section counts below are historical readings, not current availability.

No confirmed sections are available here. The selected term may not have been fully read.

Every MATH 31B section and instructor

Reading these figures

Raw is the mean of the recorded letter grades. The adjusted historical GPA pulls an instructor's average toward the course's adjusted average, which itself uses a department prior. It is a comparison aid, not a calibrated prediction or a student rating. Small samples carry more uncertainty. All recorded instructor roles are included, and a section is counted only once for this instructor. Grades cannot establish workload or explain why outcomes differed.

What students say

dibs measures outcomes. For students' experiences of the class, BruinWalk has reviews.

Reviews for LI, LINFENG in MATH 31B