Current instructor

Tonghai Yang

/5Adjusted rating
/5RMP difficulty
captured reviews
About this rating

Raw average: 3.02/5 from 45 quality ratings. The adjusted rating blends this with the UW review average (3.66/5), weighted as 20 additional ratings. Smaller samples stay closer to that average. Each captured review is counted once in the prior; this does not correct who chooses to leave a review.

RMP profile ↗ · All captured review dates; profile matched by name.

What students say

Original student reviews · all captured dates

MATH 542
Quality 1/5Difficulty 5/5
The average of the midterm rise from 64 to 71 at the end of the semester. Even given the fact that a lot a lot of Students quit after the midterm, there is no curve on the grades. The workload is way more than 3 credits.
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MATH 542
Quality 1/5Difficulty 4/5
His lectures are awful. No lecture notes, not organized at all. He leaves a lot of homework and seldom provides the solutions in time.The exam scope he gives is very unclear, with almost everything taught and hundred of problems.He is a very tough grader and nearly 1/3 students in his class flee after the midterm. Avoid him at all costs.
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MATH 542
Quality 2/5Difficulty 5/5
Prof Yang is nice. Nothing against him personally. Content: 400 pages of Dummit & Foote from Ring (p. 222) to Galois (p. 640), including difficult topics like Module Theory. Workload: 12 weeks of homework with no lecture notes and selected solutions. Difficulty: Exam averages were low (71.55 and 77.14), yet a 90 overall is required for an A.
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CALC221 · course not matched
Quality 4/5Difficulty 2/5
Funny professor who wants his students to succeed. You get used to his accent, and it's not too bad. Lectures can be quick, but if you read the assigned weekly readings and attend discussion sessions, you'll be fine. Don't need HS calc to do well but do spend some time with the course precalc review. Just be ready to spend time practicing!!
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MATH 221
Quality 2/5Difficulty 3/5
Very nice person who clearly knows a lot about math but has absolutely no idea how to explain it. Just talks about mathematical things he thinks is cool instead of teaching the exam material, and has no problem with exam averages consistently being in the low 70's. Projector or computer breaks at least once a lecture as well.
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MATH 221
Quality 1/5Difficulty 5/5
Very nice, funny guy. Caring as well. As a professor, absolutely not. I have never taken calc, and the way he taught it was like a foreign language. He wrote very fast in lecturers, yet you cant understand his writing. He has a thick accent, and he makes mistakes in lectures all the time. I stopped going cause it was a waste of my time. Dropped it.
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Personal experiences, not a representative survey. Profile matching and captured coverage are shown in the source details.

Classes with Tonghai Yang

MATH 849 covers the classical and modern theory of automorphic forms and the representation theory of GL(2).

Offering recorded · Fall 2026

Recent recorded grades — Fall 2022: 4.00 GPA, 100.0% A/AB (n=25 letter grades).

historical GPA · grades

Fall 2022–Spring 2025 · limited sample

A graduate-level seminar covering selected topics in Number Theory.

Offering recorded · Fall 2026

Recent recorded grades — Fall 2025: 4.00 GPA, 100.0% A/AB (n=6 letter grades); Spring 2026: 4.00 GPA, 100.0% A/AB (n=10 letter grades).

historical GPA · grades

Spring 2022–Spring 2026 · limited sample

Recorded teaching history

Explore courses taught by this instructor →
Browse recorded courses
TermCourseTitle
Fall 2026MATH 849Automorphic Forms
Fall 2026MATH 967Seminar in Number Theory
Fall 2026MATH 990Reading and Research

Teaching history may be incomplete. Course pages contain course-specific feedback and citations.

Instructor identity & provenance
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