Growth Mindset is hands down the best jiu-jitsu gym I've ever trained at bar none. I've been training for seven years and have trained at a lot of different gyms during that time. Every gym says they're a family, every gym says they care about their students, but Growth Mindset is the first place where I truly felt that was real. The difference starts with Mark. What sets him apart isn't just his knowledge of jiu-jitsu--it's the genuine care he has for every single person who walks through those doors. There is no hierarchy, no ego, no favorites. Whether it's your first class or you've been training for years, he treats everyone with the same respect and invests in everyone equally. I remember after one of my very first classes, I stayed talking with Mark and a few of the members for over an hour and a half. It wasn't small talk--it was one of the most genuine conversations I'd had in a long time. I left that night knowing I didn't want to settle for training anywhere else. Around the time I signed up, I had just been laid off from my job. I was stressed out of my mind wondering how I was going to pay my bills and what my next step in life was going to be. Looking back, the one thing that kept me grounded during that time was walking through the doors of Growth Mindset. No matter how bad my day had been, the moment I stepped on those mats I felt like I was home. I wasn't just another membership I was family. That first month I was also preparing for a HYROX competition, so I could only make it to class three times out of the whole month. Most gyms would've just said, "That's on you." Instead, Mark prorated my membership and credited me toward the following month. He didn't have to do that. There was no policy requiring it. He simply did it because he genuinely cares about people. That small act told me everything I needed to know about the kind of man he is. The culture he's built is something that's incredibly rare these days, there is absolutely zero ego. Mark is always asking for feedback from the students. He wants to know what we're feeling, what makes sense, and what doesn't. He's humble enough to know that coaching is about helping people learn, not about proving he's the smartest person in the room. When I was preparing for my most recent competition, Mark did something no coach had ever done for me before. He sat down with me and watched footage from my previous tournaments. We broke down every mistake I made, why it happened, how to prevent it, and even developed techniques that better fit my style of jiu-jitsu. Every other gym I've trained at would've simply told me, "Train harder." Mark actually taught me how to get better. I ended up placing fourth in that competition. Instead of focusing on the fact that I didn't win a medal, Mark immediately pointed out how much I had improved. He celebrated the things I'd done well, highlighted the progress I'd made, and gave me a clear plan to keep growing. That's what great coaching looks like. The amount of work this man puts in is unbelievable. While preparing me for my tournament, he was also coaching another teammate for his competition, hard sparring almost every day, organizing cross-training sessions at other gyms, and somehow still preparing for his own tournament. I've never seen someone work that hard, day after day, without complaining once. Even while training harder than 99% of instructors out there, he stays humble. He'll still remind us that he's human, still learning, and still growing right alongside us. That humility is what makes him so special. Mark and Sabrina have built something truly exceptional. They've created more than a gym they've built a community where people genuinely care about one another. I can honestly say this gym helped carry me through one of the hardest periods of my life, and I'll never forget that. I hope one day I can be half the man Mark is. I'm incredibly proud to call him not only my coach, but also family. Thank you, Mark and Sabrina, for everything you've done for me and for this community. What you've built is something truly special. Love you guys! read more

A friend highly recommended this gym after enrolling his sons for a few weeks, so I decided to enroll three of my sons as well. We started with one class per week, but my boys were always so excited to go back that we quickly moved to twice a week. They would come home wanting to show me everything they had learned, so I eventually started training too as a way to connect with them. It didn't take long for me to understand why they enjoyed it so much. The head coach, Mark Miller, has a wealth of BJJ knowledge and a clear, effective teaching style. He provides just the right amount of detail to help students understand the techniques while still challenging them to problem-solve and develop their skills on their own. Beyond his instruction, it's obvious that Mark genuinely cares about his students and regularly puts in extra time and effort to help them improve. It's common to see him staying after class to answer questions, help students work through different positions, prepare them for upcoming tournaments, or simply spend time connecting and talking about life. I can't speak highly enough of this gym. Mark and Sabrina have created something truly special with this community, and I'm grateful that my boys and I get to be a part of it. read more

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We love Growth Mindset Collective! Our son has grown so much in the year we have been with them. Coaches do a great job supporting! If we could give more than 5 stars we would! lol read more

I was in the area and dropped in for an evening class. Coach Mark and the students were all very welcoming. The techniques Coach Mark went over were effective and can be used at any skill level. If you want great & effective training in a safe and welcoming environment, I recommend training here! read more

I've had a great experience training Muay Thai with Coach Chris. He's knowledgeable, patient, and creates a positive environment where everyone can improve, regardless of experience level. The classes are well-structured, challenging, and fun, with a strong focus on technique and conditioning. I highly recommend Coach Chris to anyone looking to learn Muay Thai and get in great shape. read more

I just started my classes a few months back and honestly it's a great experience and environment my coach gives us great advice always helps us and keeps us safe he teaches us everything but at the same time he makes it fun and safe he is a very nice person you can talk to him about anything ask him anything and he always help and answer and the students there are very nice and respectful and we all look out for each other honestly a very good experience I would recommend. read more

My girls take Jiu Jitsu lessons with Mark. They love it and we love the small class size. My eldest gets overwhelmed easily. Not a problem in Marks class. My girls come home showing us everything they've learned and telling us all about it. They love it. If your looking at putting your kids in self defense or homeschool look no further. Mark and Sabrina are great at what they do. Very nice and prompt in responding to any questions. They are the best. read more

It's been just over a month since my son joined GMC, and I've never seen him so excited about a class. We've tried many sports in the past, but nothing ever truly stuck, until now. Coach Mark does an incredible job balancing discipline and respect while still keeping the atmosphere fun and engaging. Both Coach Mark and Coach Sabrina are fantastic, and we're so grateful for the impact they've had on our son. read more

Mark is an amazing BJJ professor and received his blackbelt under the renowned master Eduardo Rocha. Classes are thorough, challenging, and safe. Mark makes sure that the culture for his studio is respectful which creates a safe environment. I've been injury-free since joining and I'm 49 years old-highly recommend this BJJ academy!! read more

Coach Mark is an exceptional BJJ teacher and mentor. His coaching style is both patient and thoughtful; he tailors his approach to meet the unique needs of each student. His clear, concise instructions made it easy for me to execute moves after just one demonstration, and he was always willing to answer my numerous questions--whether about improving my technique for competing or finding ways to enhance my overall practice. Beyond BJJ, Mark has offered invaluable life advice, embodying what it truly means to be a coach. I've recommended Mark to others in the past, and I'm delighted to do so again. read more

Growth Mindset Collective in Oakley, CA is an incredible homeschool and jiu-jitsu program! Mark Miller is an outstanding, high-level jiu-jitsu instructor with a wealth of knowledge, and Sabrina Smith brings exceptional educational expertise to the program. Together, they create a balanced, enriching experience for both mind and body. As loving parents, they understand how to nurture and support each child's growth, building not only academic success but also self-confidence and resilience. If you live near Oakley, CA and you're looking for a program that truly cares about your child's development, this is the place to be! VWG read more