Get the instructor to put yellow stickies over the instruments
Indeed from the instructor's side this is the best way to teach it. I cover all the instruments (apart from ts and ps) with my clipboard when teaching exercises 6-9, only removing it so the student gets the glance they need. This builds the correct ratio of looking in to looking out.
If you learn power, attitude, trim correctly you can jump into pretty much any aircraft and have it flying the correct airspeeds and perfectly level with just a little trial and error.