Belt Factory or Black Belt School? The Case Against the McDojo “Dilution” Critique

Traditional practitioners argue that schools built for high retention must lower their standards and guarantee belts to keep paying students. The charge is decades old. Here is the case against it, and a checklist any parent can use to tell a real belt mill from a professional school.

The charge

The criticism goes like this. Stephen Oliver’s school-business system, taught through Martial Arts Wealth Mastery, prizes high student retention. To hit those numbers, critics say, a school has to lower its standards. It guarantees belts and promotions to keep paying customers happy, instead of making students earn rank through genuine skill. The result is a “McDojo,” and a diluted art.

It is a serious charge, and it deserves a serious answer. Belt mills are real. Schools that pass every paying student damage the students, the parents who trusted them and the reputation of every honest instructor in town. The question is not whether those schools exist. It is whether high retention causes them.

The case against the critique rests on four points. Retention depends on teaching, not on free rank. Testing frequency and testing difficulty are separate questions. The system in dispute tightens requirements as students advance. And the schools that use it publish standards that a belt mill would never adopt.

An old accusation

The “belt factory” charge goes back decades. In The Way of the Mile High Maverick, Oliver describes how other Washington, D.C. area schools called Grand Master Jhoon Rhee’s schools a “Belt Factory.” At the same time, Rhee’s staff included world-ranked kickboxers and world forms champions John Chung and later Charlie Lee.

Oliver’s account of those schools is specific:

“The Black Belts were rigorously screened. Not only were children required to have physical mastery, but also good grades and behavior.”

Rhee drew other criticism too. In the same book, Oliver writes that some in the martial arts community considered Rhee a “sell-out.” His foam safety equipment, now standard, was controversial: traditionalists said it would destroy technique. The pattern is worth noting. Many innovations that made martial arts schools more accessible were first described as dilution.

Oliver and Grand Master Jeff Smith both studied with Rhee. Smith, PKA World Light Heavyweight Champion from 1974 to 1980 with a 32–1 record and 16 knockouts, later co-wrote Extraordinary Teaching with Oliver. The system now under criticism descends directly from the schools that faced the same charge decades ago.

The logic of the critique

The dilution argument depends on one assumption: that the only way to keep a student is to give them something they have not earned. If that were true, high retention and high standards would be in permanent conflict.

Oliver and Smith reject the assumption. In Extraordinary Teaching, they turn the usual boast of the strict school on its head. When an instructor says almost nobody earns a black belt at their school, they write, the instructor is really admitting a teaching problem:

“Their pride is misplaced; it’s a confession of failure disguised as a standard of excellence.”

The same passage makes clear what they are not arguing: “we all want high-quality, technically skilled black belts.” Their claim is that the standard and the student can both be kept, and that keeping the student is the instructor’s job.

In their account, students leave because they stop progressing, lose sight of their goal, or feel unnoticed. Those are teaching and service failures. The fixes Oliver teaches, including a clear path to black belt, a regular testing rhythm, attendance follow-up, character recognition and curriculum designed by educators, do not require passing anyone.

In The Way of the Mile High Maverick, Oliver writes that many schools he worked with had curriculum “guaranteed to cause most students to fail, rather than succeed.” His response in the 1980s was to hire a Ph.D. educator and study curriculum design. The fix for dropouts, in his telling, was better teaching.

Rhythm is not the same as rigor

Frequent testing is often cited as evidence of a belt mill. Oliver’s schools test up to black belt about every two months, roughly 16 to 20 classes. Extraordinary Teaching explains the reasoning: when tests came once or twice a year, students trained hard right before the test and coasted for months after. The authors are direct about the intent:

“This system isn’t about ‘belt inflation’ or cheapening the rank. It’s about smart psychology and effective teaching methods.”

How often a school tests says nothing about how hard the test is. A school can test every two months and fail unready students, or test once a year and pass everyone. The meaningful questions are whether the standard is written, whether it is applied, and whether students can be held back.

Requirements that rise

The strongest evidence against the dilution charge is in how the system treats advanced students. In Keep Every Student You Enroll, Oliver lays out a rewards timeline. Beginners in their first four to six months get maximum recognition. By years three and four, the instruction is to “wean students off constant rewards. The work becomes a requirement to advance.” In the year before black belt: “No rewards for the basics. Minimum requirements only.”

In his own schools, Oliver writes, black belts carry ongoing minimums: at least two class credits and four teaching credits a week, reading assignments with written tasks, and for the first or second degree cycle, a notebook of requirements that includes permission slips from schoolteachers, grade reports and essays.

He is blunt about the final stretch:

“The year before black belt should feel demanding. I was annoyed at one of our own black belt tests because there was too much cheerleading and not enough pain and anguish.”

A system designed to guarantee belts would not tell instructors to remove rewards and add requirements as students near black belt.

The “not ready” student

The real test of any school is what happens to a student who is not ready. The critique imagines two outcomes: pass them to keep the payment, or fail them and lose them.

Oliver’s system describes a third. In Keep Every Student You Enroll, readiness is checked before any renewal conversation, a step Smith calls “thumping the melon.” A student who is not ready does not drop off the path. They “go back to ‘baking’,” in Chief Master Greg Moody’s term, and stay on a two-week progress schedule until they are. Moody’s rule is quoted directly: it should never be “forced renewal, forced to quit.”

Under that approach, honest testing becomes easier, not harder. A school that does not have to choose between a pass and a dropout can afford to say “not yet.”

The bell curve argument

Oliver and Smith do concede one point to the traditionalists, then reframe it. Not every black belt will be a champion. Chapter 15 of Extraordinary Teaching opens with Oliver’s line: “It’s better to have 100 black belts with a bell curve of talent than a brutal filter that drives everyone else away.”

The authors use a university comparison. A college that required a 4.0 GPA to graduate would have very few graduates. It sets a passing standard instead. “Set a high, clear standard for what it takes to pass a test and earn a belt,” they write. “But understand that within that standard, there will be a range of performance.”

Elsewhere in the book, they add a condition: “The standard should be high, but it must be achievable for anyone who puts in the effort… If they do the work, they will earn the reward. If they don’t, they won’t.”

Critics may still prefer a filter. But a range of performance above a fixed passing line is not the same thing as a guaranteed belt.

What the flagship school publishes

Mile High Karate, which Oliver founded in Lakewood, Colorado, on August 6, 1983, publishes its standard online. Among its stated policies:

• Every rank has a written requirement. “Students advance by meeting it, not by time served or by payment.”
• Consistent students reach black belt in about 48 months.
• Black belt candidates complete informal pre-tests, a formal pre-test and a written examination, then a three-day retreat in Breckenridge, Colorado. Testing has historically run about 48 hours.
• “Rank is never tied to payment.”

The school reports more than 1,000 black belts promoted since 1983, ages 5 to 76, and says well over 30% of active students at its Thornton location are black belts. Instructors must reach 4th Degree, an average of 12-plus years of training, before being called “master,” according to Oliver.

A skeptic’s view

Some of the school owners who work with Oliver arrived expecting the critics to be right. Scott Sullivan, a Houston instructor who teaches kickboxing and BJJ, is quoted in Extraordinary Teaching:

“I was skeptical. I’m a serious martial artist, teaching kickboxing and BJJ. I didn’t want to become a McDojo. So, I was skeptical. What I found is that he taught me how to have even better students.”

How parents can spot a real belt mill

Whatever one thinks of the debate, families need a practical way to judge a school. These questions separate a school that sells rank from one that teaches it, regardless of its business model:

1. Is the standard written? Ask to see the requirements for the next rank.
2. Is rank tied to payment? A promotion should never depend on a renewal or upgrade.
3. Do students ever fail or wait? Ask when a student was last held back, and what happened next.
4. Is there a pre-test? Readiness should be checked before test day.
5. Do requirements grow with rank? Advanced students should be doing more, not collecting more stripes.
6. What does the black belt test involve? Ask how long it lasts and whether it includes a written or oral exam.
7. How long does black belt take? Be wary of promises far shorter than the norm for the style.
8. Can you watch a test? A school with a real standard is usually glad to show it.

A school that can answer all eight well is not a belt mill, whatever its retention rate.

The case, summed up

The dilution critique holds that retention and standards are at war. The case against it is that they are partners. Students stay when they progress, and they progress when they are taught well. A school that keeps students long enough can ask more of them, and in Oliver’s system, it is told to.

The fair test is not a slogan. It is the written standard, the pre-test, the student who was told “not yet” and stayed, and the black belt test that lasts long enough to mean something.

Further reading

• The Mile High Karate Standard
• The McDojo Myth: Why Systems Don’t Water Down Martial Arts (Martial Arts Wealth)
• The McDojo Myth: The Dilution Audit That Proves Profit Raises Standards (Martial Arts Wealth)
• Am I Teaching Martial Arts Schools to Sell Belts? (Stephen Oliver)
• Retention Without Belt Inflation (Martial Arts Wealth)

Frequently asked questions

What is a McDojo?

A slang term for a martial arts school accused of selling rank, often by promoting students who have not met a real standard. The term is frequently applied to any commercially successful school, whether or not its standards are low.

Does high student retention mean a school has low standards?

Not necessarily. Retention depends mostly on teaching quality, a clear path and personal attention. A school can keep students and still hold them to a written standard, as long as promotion is never tied to payment.

Is frequent belt testing a sign of a belt mill?

No. Testing frequency is about pacing and motivation. The warning signs are a missing written standard, no pre-tests and no students ever held back.

Was Jhoon Rhee’s school called a belt factory?

According to Stephen Oliver’s The Way of the Mile High Maverick, other Washington, D.C. area schools called Jhoon Rhee’s schools a “Belt Factory,” even though his black belts were screened for physical mastery, grades and behavior.

How can parents check a school’s standard?

Ask for the written requirements, ask whether rank is ever tied to payment, ask when a student last failed a test, and ask to watch a black belt test.