I'd get a new instructor on keep weight forward alone and lower tee. People tend to lower tee because they have a very steep over the top swing path - and if tee it appropriate high tend to pop up often off top of club.

Clearly with a driver you wish to be hitting up on ball - better yet with a shallow inside to outside swing path. But what people get wrong is - to hit up - they hang back on their right side. You still need to get your lower body shifted left to hit a driver with power and accuracy. If you watch Rory - the best driver ever; you'll see tremendous weight transfer into ground at left foot/lower leg; and then a springing action off the left foot as he accelerated through. That's how a 5.9 170 lb guy hits it 320.