Advanced individual trombone instruction requiring instructor consent for first-time enrollment.
The course is rated as moderately difficult, with a difficulty rating of 3.
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MUS PERF 421
“Used by” includes alternatives; linked courses may have other requirements. This is a best-effort interpretation; check the catalog requirements above.
Mark Hetzler provides good feedback but struggles with disagreement, viewing it as disrespectful. He delivers criticism that is often personal and refuses to consider contradictory views, though he is sometimes great.
Recent recorded grades — Spring 2010: 4.00 GPA, 100.0% A/AB (n=6 letter grades); Fall 2010: 4.00 GPA, 100.0% A/AB (n=6 letter grades); Spring 2022: 4.00 GPA, 100.0% A/AB (n=1 letter grades).
MARK HETZLER is recorded teaching in Fall 2006, Spring 2007, Fall 2007, Spring 2008, Fall 2008, Spring 2009, Fall 2009, Spring 2010, Fall 2010, Spring 2011, Fall 2011, Spring 2012, Fall 2012, Spring 2013, Fall 2013, Spring 2014, Fall 2014, Spring 2015, Fall 2015, Spring 2016, Fall 2016, Spring 2017, Fall 2017, Spring 2018, Fall 2018, Spring 2019, Fall 2019, Fall 2020, Fall 2021, Spring 2022, Fall 2022, Spring 2023, Fall 2023, Spring 2024, Fall 2024, Spring 2025, Fall 2025, Spring 2026. Recorded history may be incomplete and does not establish a future schedule.
Recorded history may be incomplete and does not establish a future schedule.
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| Section | Mode | Enrolled / capacity | Waitlist |
|---|---|---|---|
| IND 089 | Classroom Instruction | 2 / 10 | 0 |
| IND 189 | Classroom Instruction | 1 / 5 | 0 |
Times are Central. Select a meeting for details; export includes recorded dates for the selected sections. Enrollment reflects scan time.
Mark Hetzler provides good feedback but struggles with disagreement, often taking criticism personally and refusing to consider contradictory views.
Recent recorded grades — Spring 2010: 4.00 GPA, 100.0% A/AB (n=6 letter grades); Fall 2010: 4.00 GPA, 100.0% A/AB (n=6 letter grades); Spring 2022: 4.00 GPA, 100.0% A/AB (n=1 letter grades).
The course is rated as moderately difficult, with a difficulty rating of 3.
Students may find the instructor's personal criticism and lack of open-mindedness frustrating, though he can be great at other times.
Latest available · Spring 2022— not enough history to project Fall 2026.
Through Spring 2022
Descriptions, prerequisites, and recorded course offerings.
Observations at scan time; dates do not imply when a catalog change took effect.
Advanced Trombone
Recorded 2026-09-07[
{
"run_id": "20260907T155543-ce3781c4",
"semester": "1272",
"observed_at": "2026-09-07 15:55:43.033547+00:00",
"offering_id": "1272:664:013514",
"course_id": "MUSPERF 421",
"course_uid": "course_a8df98d8511573954e202977",
"term_id": "1272",
"source_course_id": "013514",
"source_subject_id": "664",
"title": "Advanced Trombone",
"credits_min": 2,
"credits_max": 4,
"typically_offered": "Fall, Spring"
}
]Original comments behind the course and instructor summaries.
Recorded grade distributions by term, section, and instructor.
Explore recorded gradesRecorded model configuration, reasoning, and tool conversations.
{
"model": "nvidia/Qwen3.6-35B-A3B-NVFP4",
"model_revision": "1355db6a052410cfd62085d94b58866fd0f2c3c5",
"task_version": "14",
"output_id": "efb1014ee5b7b4f0e9bc129e3e9dae14dd48ea730b4e7d75cfb38501b87b33c8",
"requirements_status": "needs_review",
"dataset_revision": "e243353dcb7d79b7247ced91d69443ef4c2a6349",
"observed_at": "2026-09-07 15:55:43.033547+00:00"
}