CHEM 153A Dis 2D

Seats

Open, 4 seats left.

25 of 29 enrolled.

Read 6 hours ago. The latest refresh is overdue. Seats and instructors may have changed since. Check the registrar before enrolling.

Meets

W 9:00am-9:50am

This discussion only. You also attend Lec 2.

Final

Sun 6 Dec, 11:30am to 2:30pm

One exam for the whole class, Los Angeles time.

Read 6 days ago.

Grades

3.31

Predicted GPA

Historical records across all instructors; 7,554 letter grades

dibs has seen this section open 3 times since 18 August. The last time was 28 September.

Enroll on the registrar Sign in to watch for an opening

A board is one quarter you are drafting, so it needs an account to live in. Signing in brings you straight back to this page, with this class still in front of you.

What watching takes

Your setup, with any current hold shown beside the watch control.

An account

An alert needs an email address. You can browse courses and grade history without signing in.

Your year

Helps dibs interpret enrollment limits. Uncertain eligibility may still be included with a caveat.

Choose after signing in

When you can enroll

Set your appointment or acknowledge that an open seat may not be available to you yet.

Set after signing in

A watch slot

25 per account. A lecture watch also covers its discussions. Paused watches still use a slot.

25 free watches

Before you can enroll

Tell dibs what you have already taken and this line will say which of these you have. Your list.

From the registrar Registrar note

Any student attempting to save or sell a spot for another student is violating Student Conduct Code 102.23d and may be referred to the Office of the Dean of Students. Seats are held for entering students who enroll through New Student Orientation sessions beginning July 2, 2026. New student restrictions will be lifted on September 15, 2026 at 8 a.m. Enrollment is limited to departmental majors on the priority and first enrollment passes. Any student may enroll on the second pass, space permitting. PTE numbers are NOT available; do not contact the instructor for a PTE number. There will be two MANDATORY midterm examinations from 6 to 7:50 p.m. on the following Fridays: October 23 and November 20, 2026.

The new-student hold ended on 15 September.

Restrictions checked 6 days ago and may be outdated. Unwatched sections are rechecked less often than watched sections. Check the registrar before counting on a seat.

When it meets

This discussion and its linked lecture.

Mon

Tue

Wed

Thu

Fri

9am

10am

11am

12pm

1pm

2pm

3pm

4pm

4pm-4:50pm

4pm-4:50pm

9am-9:50am

4pm-4:50pm

4pm-4:50pm

Scroll sideways for the whole week. All meeting times are listed below.

Dis 2D
W 9:00am-9:50am
Lec 2 (required lecture)
MTWF 4:00pm-4:50pm

Boelter Hall 5419

Grades

3.31

Predicted GPA

Historical records across all instructors; 7,554 letter grades

Of the 7 people in the grade record for CHEM 153A, the 2 with the most grades: LANNAN, RYAN at 3.31 over 5,633 grades and ELLIS GUARDIOLA, KAT at 3.31 over 1,124 grades.

A range: 55%
P/NP: <1%
D/F/W: 4.8%

Full grade history for CHEM 153A

What students say

dibs measures outcomes: grades, seats, how fast it fills. For what the class is actually like to sit in, BruinWalk has the reviews.

No assignment details are available in this review summary. Based on 246 reviews; source checked about 1 month ago. Missing details do not mean there are no papers or exams. Check the current syllabus.

Reviews for CHEM 153A Search the reviews for N. Le

Will it still be here

high risk chance of closing before your enrollment pass.

Final enrollment per term from four years of grade data. Summer excluded: different population, different pass structure.

27722W
25122S
18122F
28123W
31823S
22223F
35024W
35024S
20424F
29825W
33525S
30025F

Peak 350 · most recent 25F at 300

Seats over time

Nothing read since 16 Oct, 6 hours ago. Over about 2 months before that, filled by 11.

3 times reopened

25 of 29 · 4 left

18 Aug 18:4017 Sep 02:5616 Oct 11:12 · 6 hours ago

Checked 168 of the 1062 hours with hourly history, 16%. No reading was recorded in 894 hours. dibs had no hourly record before 2 Sep, which is the other 348 of 1410 plotted.

A dot is a reading where something moved: the seat count, the status, or the waitlist. Flat between dots joins recorded counts; changes between reads may be missed. The line starts when dibs first saw this section rather than reaching back before it existed. The last one is the last time dibs read this section, moved or not, and that was 6 hours ago. It is where the line stops, not where the count is now.

Show the readings (32)

Recorded	Enrolled	Capacity	Status	Waitlist	Hours read
16 Oct 11:12	25	29	open	-	31 of 215
7 Oct 13:05	25	29	open	-	2 of 8
7 Oct 06:12	26	29	open	-	2 of 8
6 Oct 23:12	27	29	open	-	3 of 12
6 Oct 12:42	26	29	open	-	7 of 37
5 Oct 00:52	27	29	open	-	5 of 49
3 Oct 00:22	26	29	open	-	10 of 62
30 Sep 11:12	27	29	open	-	2 of 8
30 Sep 04:12	28	29	open	-	2 of 5
30 Sep 00:02	27	29	open	-	2 of 5
29 Sep 20:32	28	29	open	-	5 of 30
28 Sep 15:02	27	29	open	-	3 of 15
28 Sep 01:02	28	29	open	-	19 of 99
23 Sep 23:42	29	29	closed	-	2 of 4
23 Sep 20:32	28	29	open	-	19 of 96
19 Sep 21:22	29	29	closed	-	4 of 22
19 Sep 00:32	28	29	open	-	2 of 7
18 Sep 18:42	27	29	open	-	2 of 9
18 Sep 10:22	26	29	open	-	5 of 21
17 Sep 14:42	27	29	open	-	10 of 41
15 Sep 22:32	29	29	closed	-	2 of 5
15 Sep 18:32	24	29	open	-	2 of 4
15 Sep 15:02	21	29	open	-	2 of 5
15 Sep 11:32	18	29	open	-	45 of 313
2 Sep 11:40	15	29	open	-	2 of 2
2 Sep 10:40	15	27	open	-	2 of 2
2 Sep 09:40	15	29	open	-	2 of 50, 46 no hourly record
31 Aug 08:40	15	27	open	-	no hourly record
27 Aug 10:40	15	26	open	-	no hourly record
22 Aug 00:40	15	25	open	-	no hourly record
21 Aug 11:40	14	25	open	-	no hourly record
18 Aug 18:40	14	23	open	-	-

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.

Class chat

Nobody on dibs watches this class or has it on a plan yet. Nobody has posted yet.

Dis 2D shares one room with Lec 2 and every other discussion under it, because that is what a student means by "my class".

Reading a room needs no account. Posting does, and it is free.

Seats, time, final and grades

Put this class on a board

An account

Your year

When you can enroll

A watch slot

Before you can enroll

From the registrar Registrar note

When it meets

Grades i An estimate based on historical registrar grades, not a student rating. Instructor estimates are pulled toward the course and department average in proportion to how little data there is, so a twelve-person seminar cannot top the list on noise. The sample size is printed beside it.

What students say

Will it still be here i The worse of two readings: how full this section is right now, and how quickly the course has historically filled. A tier rather than a percentage, because reserved seats make any number optimistic: an open seat may be held for a major or an intake you are not in.

Seats over time

Class chat

Grades

Will it still be here