AI Rate Professor

Mathematics

Ryoichi Osawa

CIS121 · MATH105 · MATH220 · CALC150 · MATH140 · MATH70 · MATH230 · MATH115 · MATH150 · MATH250 · 95 lifetime ratings

AI rating
23/100
RMP rating
2.4/5
Take again
36.11%
Difficulty
4.4

The decision

if you are strong in math and want a demanding, proof-focused instructor; .

Best fit · Hardcore LearnerTough graderTest heavyLecture heavyPolarizing teacherMath-major focused
  • Students are sharply split, but many negative reviews describe rude, harsh, or discouraging interactions.
  • The course is intellectually demanding and and notation.
  • Some math-focused students praise him as rigorous and .

Key questions

Four answers before you build your schedule.

Is this an easy A?

HardWork

35/100

and , but strong grades still require heavy practice, precise work, and high math confidence.

In-person evidence shows some grade support through , while online evidence does not suggest an easy A.

Is the course easy?

BrainBurner

15/100

Students describe abstract concepts, proof-style reasoning, strict notation, and a pace that punishes weak foundations.

Both formats describe hard concepts, but .

Is attendance flexible?

Mandatory

5/100

as mandatory or says skipping class will hurt performance.

Both online and .

Is this professor recommended?

Avoid

32/100

Recommendation is low overall because many students say his teaching style is harsh, though .

Online reviews are fully negative, while .

Course guide

See how this professor fits your week.

Grading

Strict

28/100

He is widely described as a tough grader who removes points for reasoning, notation, and presentation, though and .

Format shift

, while online reviews mainly reinforce strictness.

Workload

Heavy

30/100

Students report lots of , and high preparation demands.

Format shift

, while online reviews focus more on classroom tone.

Teaching experience

Poor

38/100

Some students praise his rigor and feedback, but many describe him as , and discouraging.

Format shift

Online reviews are negative, while and strong praise from advanced math students.

Assessment method

FocusOnExams

82/100

, and exams that require precise reasoning.

Format shift

, and online reviews do not contradict it.

Luni fit check

Weigh these signals against your actual schedule.

Get help balancing workload, grading, and timing when no option is an obvious fit.

Course format

Compare the in-person and online experience.

Classroom format

In person

48 reviews

High confidence · Best fit for Hardcore Learner

In-person reviews are highly polarized, with and rude behavior but strong praise from math majors who want rigor.

Main concern

, and uncomfortable interactions.

What students said

“If you struggle with .”
MATH150
“ IF YOU ARE A MATH MAJOR.”
MATH220
“The career.”
MATH220

Remote format

Online

2 reviews

Low confidence · Best fit for Hardcore Learner

Online reviews are strongly negative, , and a poor question-asking environment.

Main concern

Students say the online environment feels condescending and discourages questions.

What students said

“ .”
MATH150
“I don't feel like it's an environment to be confident and ask questions while taking his class.”
MATH250

Exam style

Know what to expect from exams and major assignments.

Exams are described as difficult, test-heavy, and strict about reasoning and presentation, but reviews .

Test HeavyFew Graded ItemsNo Calculators MentionedStrict Reasoning Standards

Assessment risk

Strict

28/100

Low score means less forgiving assessment conditions.

In person

and strict exam expectations, including one comment that calculators were not allowed.

Test HeavyFew Graded ItemsNo Calculators MentionedStrict Reasoning Standards
“Doesn't allow calculators.”
MATH150
“ , and he doesn't give clear feedback.”
MATH150
“easier, close to study guide/examples.”
MATH230

Online

Online reviews do not clearly prove webcam, proctoring, Lockdown Browser, open-book policy, or .

Policy unclear

Student evidence

See what students actually said.

Top student voice

“ if you are math major who intends to go into pure mathematics.”

Voice snapshots generated from 50 reviews, highlighting key themes in , and student fit. Credibility rating: High.

🎯 Teaching Quality

38/100

“Osawa is a good mathmetician but not a great teacher.”

⚖️

28/100

“He will fail you if you don't meet his standards.”

🧠 Difficulty Level

15/100

“You are expected to think and reason like a mathematician.”

Theme 1

🧑‍🏫 About Teaching Style

  • He is very blunt with and it .
  • He doesn't make us memorize formulas but expects us to use our thinking skills to derive the formulas and solve problems.
  • He sucks at teaching, instead of .

Theme 2

📈 About Difficulty & Grades

  • Not an easy class, don't expect to coast.
  • Everything needs to be done perfectly, or else you fail.
  • Lots of and study guides were very accurate.

Theme 3

🎓 About Student Fit

  • IF YOU ARE A MATH MAJOR.
  • If you struggle with .
  • If you are not a math major, you will struggle in his class.

Data context

See exactly what the AI read.

Analysis sample

50

Recent reviews read by the AI

95

Lifetime ratings

90/100

Evidence confidence

Fifty reviews across many years provide detailed and consistent evidence of a polarizing but demanding teaching style.

Inside 50 stored ratings

Quality ratings

5 out of 521
4 out of 510
3 out of 55
2 out of 512
1 out of 548

Course coverage

MATH22021 reviews
MATH1506 reviews
MATH2306 reviews
CIS1215 reviews
MATH2504 reviews
Show 5 more courses
MATH1153 reviews
MATH1052 reviews
CALC1501 review
MATH1401 review
MATH701 review

Reported outcomes

No letter grade reported results lead the reported letter grades.

48 reported outcomes

A range

15

A+ 5 · A 8 · A- 2

B range

5

B+ 1 · B 4

C range

10

C 9 · C- 1

D range

2

D 2

F

0

No reported values

No letter grade reported

16

Drop/Withdrawal 8 · Incomplete 2 · Not sure yet 4 · Rather not say 2