This Law tells us to look for the simplest solution. The solution with the least moving parts. The solution that we can most easily prove to be wrong! I like to think of this Law more as acknowledging you can over-complicate things. Just because something is the simplest, does not mean it is not complex.
Think of a problem/issue you are having with your classroom or a student. Now, list some idea fragments on a piece of paper that might lead to solving this issue/problem. Which one has the least moving parts? Which one is "simplest"? Try that one first. See what happens. Don´t forget to walk yourself through the inversion model as well as some second-order thinking before you start!