It does not take a big effort to adjust the lens of the projector to have the image centered and clear to see. Not only is the screen completely off-centered, but it has an obstructed view. As if being a high school student was not hard enough!
This teacher is asking for their students to put in the extra effort just to be able to see the material being projected and follow the day’s lesson. Not only that, but this lack of symmetry is definitely making some eyes twitch. Give the kids a break, Teach! Spend the extra seconds and set that image straight!