Historical instructor
Original student reviews · all captured dates
Stefan is awesome. The T-Shirt project is a blast but make sure you pick a good group. Case Studies are easy but can be tough with everything else going on. Everything is graded easy but the exam is memorizing the readings/videos. KNOW THE NAMES OF THE PEOPLE IN THE VIDEOS!!Rate My Professors ↗
Koehler was a good teacher. Tons of group projects, but he made the course material very interesting and he knew a ton about the subject matter.Rate My Professors ↗
Stefan is the fricken man. Coming from an engineering background, this was my first "business-like" class. He is extremely passionate about the subject and really makes lectures enjoyable. The "busy work" that others are referring to is not bad. Most of the work is done with your group, so finding a group that pulls there own weight is crucialRate My Professors ↗
Felt it was a valuable class for students who want a taste of entrepreneurshipbusiness. "Flipped classroom" style of learning which was frustrating because it's hard to have a decent discussion in a room with 50 other students. But Stefan's very passionate and quirky, which always made for a fun and interesting class. Glad I took it.Rate My Professors ↗
I wasn't interested in the course topic so I had a hard time getting into the class. You watch online lectures from the YC combinator series and then classtime is a discussion. This is the t-shirt entrepreneur class. No final exams just 5 pop quizzes when I took it. Overall, pretty average class.Rate My Professors ↗
Honestly, the best way I can describe this class is ??????. It was a fairly easy and relaxed course, but Stefan is pretty unorganized and all over the place. He uses 10+ different online or social media platforms throughout the course and does not make directions clear. It is very difficult to keep up with all of the random busy work that he givesRate My Professors ↗
Personal experiences, not a representative survey. Profile matching and captured coverage are shown in the source details.
No teaching recorded in Fall 2026.
No courses match this selection. Try the full catalog or another term.
| Term | Course | Title |
|---|
Teaching history may be incomplete. Course pages contain course-specific feedback and citations.
{
"instructor_uid": "instructor_443d3d61ab0ae2b18c1eaf3c",
"source": "legacy",
"source_instructor_id": null,
"identity_basis": "name_only",
"identity_status": "unresolved",
"name": "STEFAN KOEHLER",
"email": null,
"first_observed_at": "2025-12-14 04:50:04.653658+00:00",
"last_observed_at": "2026-01-22 01:00:26.555427+00:00",
"ratings": {
"review_count": 21,
"quality": 4.33,
"difficulty": 2.33,
"quality_count": 21,
"difficulty_count": 21,
"profile_id": "rmp:1679601",
"source_url": "https://www.ratemyprofessors.com/professor/1679601",
"match_basis": "exact_name",
"observed_at": "2026-09-07 16:05:03.600406+00:00",
"courses": {
"course_f9745222e60401b0352a8d34": {
"review_count": 16,
"quality": 4.44,
"difficulty": 2.31,
"quality_count": 16,
"difficulty_count": 16
},
"course_85c2f5f272ab49ba582ca81a": {
"review_count": 1,
"quality": 5,
"difficulty": 2,
"quality_count": 1,
"difficulty_count": 1
},
"course_711e0eb5a0b86ceeefd6dd86": {
"review_count": 2,
"quality": 3.5,
"difficulty": 2.5,
"quality_count": 2,
"difficulty_count": 2
},
"course_ba431ca9abcfcac1bac9b4e0": {
"review_count": 1,
"quality": 5,
"difficulty": 4,
"quality_count": 1,
"difficulty_count": 1
}
},
"bayesian_quality": 4.003017455388584,
"prior_mean": 3.6596857835465957,
"prior_weight": 20
},
"current": false,
"courses": [],
"revision": "e243353dcb7d79b7247ced91d69443ef4c2a6349",
"instructor_url": "/instructors/STEFAN_KOEHLER--instructor_443d3d61ab0ae2b18c1eaf3c"
}