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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.

2.803.303.803.4022W3.4922F3.2423W3.3723F3.3124W3.1224S3.2824F3.2225W3.3725S3.382513.3025F

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 Fall 2026

Section

Lec 1

MTWF 2:00pm-2:50pm

Seats

Open

6 seats left.

344 of 350 enrolled

Seat risk

high risk

An estimate, separate from the seat reading.

Read October 16, 2026 at 2:23 PM PDT. Seat counts can change before you enroll.

Every linked section (12)
Dis 1BT 11:00am-11:50amclosed: 29 of 29 enrolled
Dis 1AT 9:00am-9:50amclosed: 29 of 29 enrolled
Dis 1DW 10:00am-10:50amclosed: 29 of 29 enrolled
Dis 1EW 12:00pm-12:50pmclosed: 29 of 29 enrolled
Dis 1GR 9:00am-9:50amopen: 2 seats left.
Dis 1JF 9:00am-9:50amopen: 1 seat left.
Dis 1HR 11:00am-11:50amclosed: 29 of 29 enrolled
Dis 1IR 1:00pm-1:50pmclosed: 29 of 29 enrolled
Dis 1LF 3:00pm-3:50pmopen: 3 seats left.
Dis 1CT 3:00pm-3:50pmclosed: 29 of 29 enrolled
Dis 1FW 1:00pm-1:50pmclosed: 29 of 29 enrolled
Dis 1KF 1:00pm-1:50pmclosed: 30 of 30 enrolled

Section

Lec 2

MTWF 4:00pm-4:50pm

Seats

Open

29 seats left.

321 of 350 enrolled

Seat risk

medium risk

An estimate, separate from the seat reading.

Read October 16, 2026 at 2:23 PM PDT. Seat counts can change before you enroll.

Every linked section (12)
Dis 2GR 9:00am-9:50amopen: 6 seats left.
Dis 2JF 10:00am-10:50amopen: 7 seats left.
Dis 2BT 12:00pm-12:50pmopen: 1 seat left.
Dis 2CT 1:00pm-1:50pmopen: 1 seat left.
Dis 2EW 11:00am-11:50amopen: 3 seats left.
Dis 2LF 2:00pm-2:50pmclosed: 29 of 29 enrolled
Dis 2AT 9:00am-9:50amopen: 7 seats left.
Dis 2HR 11:00am-11:50amclosed: 29 of 29 enrolled
Dis 2IR 1:00pm-1:50pmclosed: 29 of 29 enrolled
Dis 2DW 9:00am-9:50amopen: 4 seats left.
Dis 2FW 1:00pm-1:50pmclosed: 29 of 29 enrolled
Dis 2KF 11:00am-11:50amclosed: 30 of 30 enrolled
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