The kids range from age 4 to age 7. Despite being a difference of 3 years, the differences in development really show. The best part is that the kids aren't necessarily grouped by age. Grouping is either by belt or by size. While there is correlation between belt, age, and size, you get things like a tiny 6 year old who happens to be one of the higher belts in the class being grouped with 4 and 5 year olds half her level (<-- true story, her name is Claire). Not only that, when it's about even in age, there are lots of factors that make it hard to teach.
The 4 year olds barely pay attention. Even if I'm leading a game, it seems like the work is more interesting. If I'm teaching weapons or kata, the games or other work activities are more interesting. Even though they don't pay attention all the time, they at least do what they're told, even if I need to tell them multiple times for them to get it. I think this group - often the very new ones - do want to learn, to some extent.
The worst though is when the 5 and 6 year olds or middle belts are in groups together. The 5 and 6 year olds want to do things their way, particularly when doing games. They also love to show off how good they
The godsend are the 7 year olds, or the highest belts in class. They understand how it works. In games, I tell them what to do, and they do it. I even feel comfortable asking for their opinions, because I know they're more rational opinions (also because I'm just judging games, and don't know how it feels to them the players). When I do work, they often know what to do, which makes it easier to correct the little mistakes.
The last part that makes this hard is the actual teaching. I have to speak out information I never did before. More than once I find myself lost on what to do, or stumbling over my words trying to find the correct one. I may have the entire kata memorized verbatim, but I have trouble saying it, simply because I don't do it often. Secondly, when I teach kata or weapons, I have to stand in front of the group and look over my shoulder to make sure they're getting it. That's hard because I have to realize which hands and feet are which for them, which is mirrored for me. To add more, often times in that situation I can't make
It's not all bad. A lot of the games are fun to judge, and I learn from them as they learn from me. I think I just need to do research on guiding kids.