I will second Groundhogger's comments about the accuracy and the triggers on the Model 60, and add a few more observations based on years of ownership.
They need more full tear down cleaning than other semi-autos due to tighter tolerance between the bolt and receiver; it was designed with less capacity for unburnt powder/grit buildup in the receiver than comparable semi-autos.
Put enough rounds (many thousands) through one and it will eventually need a new "Ejector Lifter Spring". This V-spring is the weak link in the design. You can do this yourself, although it is a bit finicky to reassemble. See item #16 in the exploded view:
https://store.gravelagency.com/en/re.../model-60.html
Safety when training/clearing the firearm: due to the design of the tube feed, there will always be 1 or 2 rounds still in the loading mechanism when you dump the tube. These rounds must be cycled through the breech to fully clear the firearm. Only pointing this out because you mentioned training the girls to shoot; it is a couple more steps to clear the firearm than simply pulling a mag and clearing the breech once.
Even with all that, the Model 60 is still my go-to semi-auto. I prefer the tube feed when shooting in a high production field, it is less demanding than thumbing rounds into a spring loaded mag all day long.