And you can bring that up each time, but doesn't make it that much more effective.
Which brings up a point....how do you define a successful lesson? Does your ski school actually pay for performance? Do you ask your students for feedback? Do you leverage best practices? Do you seek feedback from peers? Do you know who the "best" snowboard instructor is at your school?
In my case, I haven't "taught" a public class in over a decade, but have coached. I define success by returning kids in the program, number of kids qualify for National Champs, number of National Champs, number who further their snowboarding beyond the team and qualitative feedback (from kids, parents and other coaches).
Once again, certainly not saying one way is better than another....but you simply can't improve what you can't measure. In the case of teaching with hardboots vs. teaching with softboots, make your own conclusion, esp if you don't have the data to support the argument.