This has been, and continues to be, a wonderful experience for us (the 12 trainers). Seeing many of the kids just absorbing what they're taught/shown, and seeing/hearing them practice what they've learned.
I find it especially pleasing on the ears when the whole room (30 students in each of 2 classes) switch between chords at the same time. Some kids are having a tough time, especially when (fast) switching from/to/between challenging chord shapes, and they're encouraged to continue practicing at home.
Last Tuesday, when I left after the 2nd class, one student was sitting in the parking lot waiting for her ride, and used the time to practice what she'd learned.
FWIW each instrument is numbered and assigned to an individual student, and they're responsible for taking them home and bringing them back the following week. We have one or other students forget to bring their uke back the following week.