There are lots of us teaching multiple levels at once.

so long as kidsare properly placed, it generally goes super smoothly! Easier and less time, from my experience, than tryiny to fit everyone into a single combined level that doesnt truly fit them all, and needs tweaking up and/or down for various kids. As you can see in my signature below, i currently have four levels going! and it is actually going well

the older they get and higher guides they get to (with good training in previous guides to make skills solid), they work more independently so as you add more time teaching more little ones, you gainn more time not teaching olders.