The problem is this doesn't fix the underlying issue. The underlying issue is that you have big people and small people that by your system could get matched together. The underlying issue is that you have kids that start crying mid-round when they're training with specific other kids (such as their brother) and are therefore not allowed to train together. Your system would not stop those exchanges from happening. If anything, it would exacerbate it.
This is like saying I have a problem when spark meets gasoline, and your solution is to randomly select and hope that spark and gasoline don't mix.
It’s hard with kids and sometimes you just have to tell them that you do NOT get to pick your opponent on the street and that life is not always fair.
Win some. Lose some.
Maybe conduct the two circle randomization drills as listed above (that’s also similar to how we did it in the Army) while limiting what moves the big guys can use rather than full out winner-takes-all rolls?
Or maybe “sell it” as beginner circle (small guys) and an experienced circle (big guys) and have the experienced guys critique their smaller opponents on what they should do differently to pin a big guy?
Every “solution” I come up with seems to make the problem worse.
If you set it up so that the bigger guys fight more people until exhausted before taking on a smaller guy, the bigger guys get more practice and will probably advance exponentially compared to the smaller guys.
The same if you make the big kids “junior instructors” for the little ones.
The big guys start REALLY understanding what they’re doing and will start progressing geometrically while the smaller guys may stay on a more linear trajectory.
Here’s what ChatGPT had to say when I plugged in your post.
I kinda liked the number 6 idea…
This situation is very common in kids’ BJJ and karate programs, and it usually means the class has reached a size where informal partner selection no longer works. The solution isn’t more micromanaging — it’s removing choice and adding structure.
1. Assign partners instead of letting kids choose.
Have the kids line up by size or belt and pair them off: 1–2, 3–4, 5–6, etc. If two kids can’t train together, just skip a spot and rotate. This removes emotional partner choices, social exclusions, and wasted time negotiating.
2. Use a rotation system.
Set up a system where one line stays and the other line rotates to the right each round. This guarantees everyone trains and automatically separates problem pairs. Some gyms also use “king line” rotations where winners move up and losers move down.
3. Divide the class into rough size bands.
Big size mismatches create a lot of problems. You don’t need exact weights, just visual groups such as:
- Group A: under ~60 lb
- Group B: 60–85 lb
- Group C: 85–120 lb
Keeping similar sizes together prevents dangerous mismatches and reduces anxiety.
4. Give problem kids fixed partners temporarily.
If there are siblings or kids who get emotional with certain partners, assign them the same partner for a few weeks. This removes the daily partner search and stabilizes the situation.
5. Separate technique partners from rolling partners.
During drilling, use assigned partners. During rolling rounds, use a rotation system. This keeps things organized while still giving kids variety.
6. Use three-person groups when numbers are awkward.
If the class can’t divide evenly, make groups of three:
- A vs B (C rests)
- B vs C (A rests)
- A vs C (B rests)
Nobody sits out long and the coach doesn’t have to constantly reshuffle pairs.
7. Manage the “tiny fearless kid” problem.
Most gyms have a very small kid who always tries to roll with someone much larger. Create a rule that kids can only choose partners within their size group. If they refuse, the coach assigns the partner.
8. Use positional sparring for emotional or sensitive kids.
Instead of full rolling, start them in specific positions such as mount, guard, or side control. This gives them structure and reduces chaotic intensity.
9. Address the social exclusion issue directly.
When kids refuse to roll with someone, it becomes a culture issue. A common rule in many gyms is: “In this gym we train with everyone.” Exceptions should only be made for size or safety reasons.
The real issue is that the program has grown to the point where casual partner selection no longer works. Most successful kids programs switch to structured rotations once the class gets beyond about 12–15 students.
A simple system many gyms use is:
Line kids up by size → pair neighbors → rotate one line each round.
No negotiation. No drama. Everyone trains.
A simple trick many kids’ programs use to stop the “nobody wants to roll with that kid” problem is something often called the Coach’s Choice Round (sometimes “Random Partner Round”).
At least once every class:
1. Everyone lines up.
2. Nobody chooses partners.
3. The coach assigns partners quickly.
An easy way to do it is to number the kids (1, 2, 3, 4, etc.) and then pair them like this:
- 1 with 6
- 2 with 5
- 3 with 4
Or you can simply draw names. No discussion and no negotiation.
Why it works:
It removes the social signaling that causes the problem. Kids don’t feel like they were chosen last or rejected. Instead, the message becomes: “The coach paired us.” That protects everyone’s ego and keeps things moving.
An even better variation is the “Secret Mission Round.”
Tell the kids: “During this round your mission is to help your partner get better.”
Examples:
- Let them practice a sweep
- Give realistic resistance
- Encourage them if they succeed
Kids suddenly treat partners differently because the focus shifts from “who I want to roll with” to “how well I help my partner.”
Another useful option is a “Skill Mission Round.”
Give both partners a specific task:
- Top person: maintain position
- Bottom person: escape
Now the focus becomes the task rather than the partner, which removes a lot of emotional friction.
The real issue your friend is describing happens in almost every kids program once the class grows and social dynamics start to form. The usual solution is simple: less choice and more structure.
Kids actually relax when the system is predictable.
One rule that helps set the culture is:
“You don’t pick training partners. Training partners pick you.”
In other words, anyone in the room is a valid partner.
Kids almost never complain about assigned partners if the rule is consistent. The problems usually appear when sometimes they choose partners and sometimes they don’t. Consistency fixes most of it.
