If you are working with children riders and teaching them to ride it can seem a bit frustrating at times as you will think that they aren't listening to all of your instructions. However this isn't the case (most of the times lol)
Children will only be able to concentrate on just a few things at a time when they are just starting out, it is how their brains are functioning at that early stage. I always pick the two most important things they need to work on at any given moment and focus on those until they become second nature.
Once those instructions are second nature then move on to the next most important point to work on, and continue to repeat this process. In no time at all you will have the child riding around picture perfect! Rather than try to force the child to learn as we do, adjust your teaching to accommodate how they learn. Happy Riding!