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Theory Jiu-Jitsu Studio

5 ★★★★★ 83 Google reviews · BJJ gym in Kaukauna, Wisconsin

BJJ gym Free trial Beginners welcome Kids & teens Competition team

Plan your first class

  • Free trial or intro class most gyms welcome new members with a free trial or intro class — check their site or give them a call to book your first session
  • Beginner-friendly all levels welcome, including total beginners — you don't need to be fit or have any experience to start
  • Kids & youth classes kids and youth BJJ classes — built around discipline, focus, and confidence
  • Competition team a competition team for members who want to test themselves at tournaments
  • Website & schedule theoryjiujitsu.com — book classes and see the live schedule
  • Phone (920) 659-0117

The classes they run

BJJ classes on the schedule at Theory Jiu-Jitsu Studio, confirmed in members' own reviews and the gym's own info — not guessed from the sign out front.

🧒 Kids BJJ 5 mentions

“I was not disappointed as my son and I eventually signed up for classes together.”

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🏆 Competition Team

“I competed in one of their tournaments that was run very professionally.”

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🛡️ Self-Defense

“Levi's skills include both self-defense and sportive, and can be beneficial for all levels of practitioners - first day through advanced.”

All gyms that run self-defense →

🌱 Beginners 6 mentions

“Levi's skills include both self-defense and sportive, and can be beneficial for all levels of practitioners - first day through advanced.”

All gyms that run beginners →

Other martial arts here

BJJ gyms are usually multi-discipline. Here's what else members mention training under the same roof at Theory Jiu-Jitsu Studio — mined from their reviews and the gym's own info.

🤸 Wrestling 2 mentions

“They also have an AMAZING wrestling program.”

Other gyms that also teach wrestling →

Disciplines are mined from reviews and the gym's own info — they show what members have trained, not a formal class guarantee. If you specifically want MMA, muay thai, or wrestling alongside your BJJ, confirm the current schedule with the gym.

What members say

The things reviewers bring up again and again across 83 Google reviews — in their own words.

🧑‍🏫 expert, high-level coaching 3 mentions

“Levi is a great instructor with a knack for giving demonstrations of techniques, complete with a thorough explanation that's easy to understand and replicate.”

🌱 welcoming to beginners 22 mentions

“Levi's skills include both self-defense and sportive, and can be beneficial for all levels of practitioners - first day through advanced.”

🤝 no-ego, friendly academy 18 mentions

“I have been lucky to witness Levi's skill as both a student and instructor - both of which is done with a humble mindset and sharp skills.”

📘 strong technique & fundamentals 6 mentions

“Levi is a great instructor with a knack for giving demonstrations of techniques, complete with a thorough explanation that's easy to understand and replicate.”

active competition team 2 mentions

“I competed in one of their tournaments that was run very professionally.”

🧼 clean, well-kept mats 9 mentions

“The gym is very clean and modern, Levi is always looking to update and make the member experience better.”

From the reviews

I made arrangements to stop in at Theory as I was in town on a work trip. I've only been practicing Jiu-Jitsu for a few months at one other gym. Theory's facilities are very nice- great mats, clean, great karma.

★★★★★ — Tim, Nov 2022

Theory came highly recommended to me from a friend. I was not disappointed as my son and I eventually signed up for classes together. My son has autism, so I was concerned about his participation, but Levi was very understanding, wanting to create a culture where all are welcome, which put me at ease.

★★★★★ — John, Jan 2023

If you’re in the Appleton area looking for a great BJJ gym, Theory is it! Lots of clean mat space for plenty of students to come train. Levi is excellent at teaching the important small details.

★★★★★ — Nina, Aug 2023

Theory Jiu-Jitsu Studio is an absolutely clean facility, open to both men and women, catering to youth through adult age, and led by one of the most passionate instructors I've met to date. Levi Van Stappen didn't name his club Theory by accident.

★★★★★ — Chris, Nov 2022

Excerpts from public Google reviews. Read all 83 reviews →

New to BJJ? Start at Theory Jiu-Jitsu Studio

Theory Jiu-Jitsu Studio comes up as a beginner-friendly gym, going by their listing and members’ reviews. If you've never rolled or set foot on a mat, that's exactly who a good beginners program is for. A few things worth knowing before your first week. First, you don't need to be fit or flexible to start — you get in shape by training, not before it, and coaches scale the intensity to you. Second, you won't be thrown into hard rolling — reputable gyms build fundamentals (positions, escapes, and basic submissions) for weeks, live rolling eases in gradually, and tapping early keeps every roll safe. Third, all levels really are welcome — ask about a dedicated beginners or fundamentals class time so your first session is alongside others who are also starting out, and leave your ego at the door. Most gyms are happy to let you watch or try a class first, so reach out before you commit.

Check beginner classes on their site

Your first BJJ class at Theory Jiu-Jitsu Studio

Nervous about walking into a BJJ gym for the first time? Almost everyone is, and good coaches expect beginners to come through the door. Here's what to know. What to expect: a typical first class is a warm-up, then drilling basic positions and escapes with a partner — not hard sparring. Rest whenever you need to; no one will bat an eye. What to wear: athletic wear you can move in (or a gi if you have one); you'll train barefoot on the mats. What to bring: water and a mouthguard if you have one — many gyms lend a loaner gi for a first class, so it's worth asking when you call. As you keep training you'll add your own gi (or a rashguard and shorts for no-gi) and a mouthguard. Live rolling eases in gradually, once your fundamentals are solid. Arrive 10–15 minutes early to sign a waiver and meet the coach. It gets easier fast — most people feel far more at home by their third class.

BJJ is a contact sport. Ease in, tap early and often, listen to your coaches, and if you have any injuries or health concerns, mention them before class and check with a doctor if you're unsure.

Where to find Theory Jiu-Jitsu Studio

3025 Spirit Ct Unit 111, Kaukauna, WI54130

Get directions

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Listing verified July 2026 from public business records and member reviews. Something out of date? Report a correction. Own this gym? Claim your listing — it's free.