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MATH 33B · Lec 2

Differential Equations

Fall 2026Johnson, C.L.4 units

Seats, time, final and grades

Seats

Open, 18 seats left.

192 of 210 enrolled, lecture and all discussions summed.

Meets

MWF 2:00pm-2:50pm

Lecture only. You also attend a discussion, listed below.

Final

Wed 9 Dec, 6:30pm to 9:30pm

One exam for the whole class, Los Angeles time.

Read 4 days ago.

Grades

3.41
predicted, all instructors · 4,509 grades

4,509 letter grades, everyone who has taught MATH 33B.

Read 14 minutes ago. This is a recent reading, not a live seat count.

Enroll on the registrar (opens in a new tab) Sign in to watch for an opening

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Put this class on a board

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Before you can enroll

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

The registrar says this two ways. Its requisites table calls the requisite above a warning, so enrollment is not blocked, and its course description for MATH 33B calls the same requisite enforced. dibs follows the table and cannot tell you which one the department will act on. Read the registrar's own page.

From the registrar limited early, then open

Information on the Mathematics Diagnostic Test and Advanced Placement (AP) credit is available at https://uclamathugrad.zendesk.com/ . 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. There will be two MANDATORY midterm examinations from 6 to 7:50 p.m. on the following Thursdays: October 22 and November 19, 2026.

The limit stands until 15 September, and lifts then. dibs still counts this class as one you can take, but not yet.

Restrictions read 4 days ago. dibs re-reads these slowly because they rarely change; watch the section and it moves to every 6 hours.

Discussions

You enroll in the discussion, not the lecture, so the seat figure above is the sum across all of them and can read open while every discussion you could actually join is full.

6 discussions, 3 open: Dis 2C, T 2:00pm-2:50pm, Dis 2D, R 2:00pm-2:50pm, and Dis 2F, R 2:00pm-2:50pm.

  • Dis 2A

    T 2:00pm-2:50pm

    Reyes Rivas, M.

    Waitlist, 0 of 3 places taken.

  • Dis 2B

    R 2:00pm-2:50pm

    Reyes Rivas, M.

    Waitlist, 0 of 3 places taken.

  • Dis 2C

    T 2:00pm-2:50pm

    Goldman, B.

    Open, 3 seats left.

  • Dis 2D

    R 2:00pm-2:50pm

    Goldman, B.

    Open, 10 seats left.

  • Dis 2E

    T 2:00pm-2:50pm

    Zheleznyak, A.

    Waitlist, 0 of 3 places taken.

  • Dis 2F

    R 2:00pm-2:50pm

    Zheleznyak, A.

    Open, 5 seats left.

When it meets

Mon
Tue
Wed
Thu
Fri
6am
7am
8am
9am
10am
11am
12pm
1pm
2pm
3pm
4pm
5pm
6pm
7pm
8pm
9pm
10pm

Meets: MWF 2:00pm-2:50pm

Discussions: T 2:00pm-2:50pm · R 2:00pm-2:50pm

Mathematical Sciences 4000A

Grades

3.41
predicted, all instructors · 4,509 grades

Of the 13 other people in the grade record for MATH 33B, the 2 with the most grades: WANG, CHENGXI at 3.80 over 1,215 grades and MARSDEN, KATIE at 3.07 over 761 grades.

A range
65%
P/NP
<1%
D/F/W
5.7%

Full grade history for MATH 33B

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.

dibs has not read this course’s reviews, so it cannot say what kind of work it sets. That is dibs not having looked. It is not a course without papers or exams, and the reviews linked below are the answer until dibs catches up.

Reviews for MATH 33B Search the reviews for C.L. Johnson

Will it still be here

medium 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.

  • 19721F
  • 19822W
  • 13022S
  • 18722F
  • 20123W
  • 21023S
  • 20523F
  • 13424S
  • 18824F
  • 20625W
  • 16825S
  • 20125F
Enrollment by term: 21F 197, 22W 198, 22S 130, 22F 187, 23W 201, 23S 210, 23F 205, 24S 134, 24F 188, 25W 206, 25S 168, 25F 201

Peak 210 · most recent 25F at 201

Seats over time

Filled by 1 over about 2 months

192 of 210 · 18 left in its discussions
17 Aug 15:079 Sep 06:341 Oct 22:02
dibs read 168 of the 698 hours its hourly record covers, 24%, and did not look in 530. dibs had no hourly record before 2 Sep, which is the other 390 of 1088 plotted.192 of 210 enrolled at the newest reading, 14 minutes ago, with 18 left in its discussions. Seats from 17 Aug 15:07 to 1 Oct 22:02, 191 to 192. dibs read 168 of the 698 hours its hourly record here covers, 24%. An hour marked as read confirms a check, not continuous monitoring. That check recorded no change; changes between checks may be missed. For 530 hours dibs was keeping a record and did not reach this section. Nothing before 2 September at 21:00, where this section's record starts, has a read either way, which is 390 hours of this window. Where the drawing is faint or broken, that never means the readings are doubtful. It means the stretch between them is unaccounted for.

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: 14 minutes ago.

Show the readings (86)
Recorded Enrolled Capacity Status Waitlist Hours read
1 Oct 22:02 192 210 open 0 of 18 7 of 23
1 Oct 00:02 192 210 open 0 of 18 3 of 8
30 Sep 17:02 189 210 open 0 of 18 3 of 8
30 Sep 10:02 192 210 open 0 of 18 3 of 9
30 Sep 02:02 193 210 open 0 of 18 2 of 5
29 Sep 22:32 192 210 open 1 of 18 2 of 4
29 Sep 19:02 190 210 open 1 of 18 2 of 5
29 Sep 15:32 191 210 open 1 of 18 2 of 4
29 Sep 12:02 190 210 open 1 of 18 4 of 12
29 Sep 01:32 191 210 open 1 of 18 2 of 4
28 Sep 22:02 190 210 open 1 of 18 2 of 5
28 Sep 18:32 188 210 open 1 of 18 2 of 4
28 Sep 15:02 193 210 open 0 of 18 6 of 19
27 Sep 21:32 190 210 open 0 of 18 2 of 4
27 Sep 18:02 192 210 open 0 of 18 13 of 44
25 Sep 23:32 190 210 open 0 of 18 8 of 26
24 Sep 22:52 189 210 open 0 of 18 2 of 4
24 Sep 19:22 191 210 open 0 of 18 3 of 8
24 Sep 12:22 192 210 open 0 of 18 2 of 5
24 Sep 08:52 194 210 open 0 of 18 2 of 4
24 Sep 05:22 195 210 open 0 of 18 4 of 13
23 Sep 17:52 196 210 open 0 of 18 2 of 4
23 Sep 14:42 197 210 open 0 of 18 4 of 11
23 Sep 04:32 196 210 open 0 of 18 2 of 5
23 Sep 00:52 198 210 open 0 of 18 2 of 4
22 Sep 21:22 197 210 open 0 of 18 6 of 19
22 Sep 03:42 198 210 open 0 of 18 5 of 16
21 Sep 12:52 196 210 open 0 of 18 2 of 4
21 Sep 09:22 198 210 open 0 of 18 3 of 9
21 Sep 01:12 199 210 open 0 of 18 3 of 8
20 Sep 18:12 198 210 open 0 of 18 15 of 49
18 Sep 18:32 196 210 open 0 of 18 7 of 23
17 Sep 20:32 199 210 open 0 of 18 2 of 4
17 Sep 17:02 198 210 open 0 of 18 6 of 20
16 Sep 22:32 199 210 open 0 of 18 2 of 4
16 Sep 19:02 201 210 open 0 of 18 4 of 12
16 Sep 08:32 202 210 open 0 of 18 3 of 8
16 Sep 01:32 201 210 open 0 of 18 2 of 6
15 Sep 20:52 202 210 open 0 of 18 2 of 5
15 Sep 16:12 206 210 open 0 of 18 2 of 5
15 Sep 12:42 200 210 open 0 of 18 4 of 12
15 Sep 01:12 201 210 open - 2 of 5
14 Sep 21:42 200 210 open - 4 of 11
14 Sep 11:12 201 210 open - 11 of 33
13 Sep 03:52 204 210 open - 3 of 9
12 Sep 19:52 203 210 open - 3 of 8
12 Sep 12:52 204 210 open - 4 of 12
12 Sep 01:22 203 210 open - 2 of 3
11 Sep 23:02 202 210 open - 3 of 6
11 Sep 18:40 203 210 open - 4 of 23
10 Sep 20:40 202 210 open - 4 of 23
9 Sep 22:40 203 210 open - 2 of 8
9 Sep 15:40 202 210 open - 12 of 106
5 Sep 06:40 203 210 open - 8 of 37
3 Sep 18:40 201 210 open - 3 of 17
3 Sep 02:40 200 210 open - 3 of 4
2 Sep 23:40 199 210 open - 2 of 4, 1 no hourly record
2 Sep 20:40 199 207 open - no hourly record
2 Sep 16:40 199 210 open - no hourly record
2 Sep 10:40 199 207 open - no hourly record
2 Sep 09:40 199 210 open - no hourly record
1 Sep 02:40 199 207 open - no hourly record
31 Aug 23:40 198 204 open - no hourly record
31 Aug 22:40 199 207 open - no hourly record
31 Aug 21:40 198 204 open - no hourly record
31 Aug 19:40 199 207 open - no hourly record
31 Aug 17:40 198 204 open - no hourly record
31 Aug 15:40 199 207 open - no hourly record
31 Aug 13:40 198 204 open - no hourly record
31 Aug 12:40 199 207 open - no hourly record
31 Aug 02:40 198 204 open - no hourly record
30 Aug 22:40 197 204 open - no hourly record
30 Aug 21:40 198 204 open - no hourly record
30 Aug 01:40 197 204 open - no hourly record
28 Aug 01:40 198 204 open - no hourly record
27 Aug 09:40 199 204 open - no hourly record
26 Aug 00:40 199 201 open - no hourly record
25 Aug 23:40 196 201 open - no hourly record
25 Aug 22:40 199 201 open - no hourly record
22 Aug 21:40 196 201 open - no hourly record
21 Aug 20:40 195 201 open - no hourly record
21 Aug 13:40 194 201 open - no hourly record
20 Aug 23:40 194 198 open - no hourly record
20 Aug 17:40 191 198 open - no hourly record
18 Aug 19:40 192 198 open - no hourly record
17 Aug 15:07 191 198 open - -
How readings and alerts work

A reading and an hourly record are different things, and most charts here hold more of the second missing than present. dibs has taken readings of a section since long before it began keeping an hour-by-hour log of when it looked, so the empty stretches are dibs saying it was not keeping that log yet, not that it looked and found nothing. That is the age of the record and not a fault.

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.

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