We must make an example of Diedre. You will note that she is performing "individual" activities.
This must be stopped!
Children cannot be allowed to develop individual skills! They must blend in with the masses, and march lockstep with everyone else in class.
If you allow a child to turn cartwheels alone, next thing you know she will be thinking individual thoughts - on her own - and that is verboten!!
Meanwhile there seem to be a few reasons to emigrate America for a new try in good "old" Europe. We would welcome this young lady and her family for a better future. Although here are also a few things that are "verboten", cartwheels are usually no problem on German schools. It is for sure that nobody is being kicked out for doing that.
I have my kids on a private catholic school owned by the Jesuites here in Germany and their nessesary mix between freedom and dutys is not bad.