Your description of the ideal learning environment above is excellent. Learning, In particular GBL (Game based Learning) should be steeped in Constructivist/Constructionist teaching approaches. Students take ownership of their own knowledge creation and in this case the actual building of objects. Your school seems to be very progressive in the move towards technology and using it effectively. Often, as you have made reference to, the teacher competency and CPD is the most important part of developing the Diigtal Learning in schools. We can have all the devices, but if we are not using them in an effective manner it is not going to yield the best results. Well done and best of luck with Minecraft going forward.