I think it is most important for a teacher to play the pieces and studies that are being played by the student.
The quickest way to unlock your talent is to take the flute out of the box.
Being unprepared heightens nerves.
Never just run through a study because you happen to be familiar with it, but use it to see what you can get from it on this new day which has been granted you.
Yes indeed I have gained a lot out of playing scales and etudes.
You can sightread better if you know your scales and arpeggios.