You are looking at Spring 2027. Enrollment for it has not opened, so these are the registrar's early listings. dibs holds 4,154 sections for Spring 2027, read 14 hours ago. Separately, it has finished 3,438 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

CHEM 153A / LANNAN, RYAN

Biochemistry: Introduction to Structure, Enzymes, and Metabolism

How CHEM 153A grades when LANNAN, RYAN teaches it. CHEM 153A, every instructor LANNAN, RYAN, every course

Grades, this instructor

3.31adjusted historical GPA, this instructor

5,633 letter grades across 11 terms, Winter 2022 to Fall 2025. The course pools every instructor at 3.31 over 7,554 letter grades.

Raw average: 3.31; The mean of this instructor's recorded letter grades in this course.
In the A range: 56.4%; A+, A and A minus out of 5633 letter grades.
D, F or W: 5.5%; D-range and F grades plus withdrawals, divided by letter grades plus withdrawals.
Taken pass/no pass: 0.4%; 10 of 20 pass/no-pass outcomes passed. Share is of letter, P/NP and S/U outcomes.

Grade distribution

A+1,137 / 20.2%
A1,271 / 22.6%
A-770 / 13.7%
B+596 / 10.6%
B599 / 10.6%
B-351 / 6.2%
C+249 / 4.4%
C244 / 4.3%
C-105 / 1.9%
D+75 / 1.3%
D69 / 1.2%
D-45 / 0.8%
F122 / 2.2%
I28 of 5,681
NP10 of 5,681
P10 of 5,681

Percentages are of the 5,633 letter grades. Grey bars are non-letter outcomes: passes (P), no-passes (NP), and 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, 3.31.

One recorded instructorCo-taught, grades shared

Winter 20223.40543 letter grades.

Fall 20223.49371 letter grades.

Winter 20233.24556 letter grades.

Fall 20233.37461 letter grades.

Winter 20243.31588 letter grades.

Spring 20243.12693 letter grades.

Fall 20243.28442 letter grades.

Winter 20253.22345 letter grades.

Spring 20253.37675 letter grades.

Summer Session A 20253.38359 letter grades.

Fall 20253.30600 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 Spring 2027

No sections are confirmed under this instructor's record in the course listing dibs read for Spring 2027.

Every CHEM 153A 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 LANNAN, RYAN in CHEM 153A