<p>OK, fine. Don't let it go. Go bother your teacher (so he or she will regret ever having helped you?), then ask him to write an errata sheet so that he will specifically draw attention to errors that people would otherwise probably not even notice.</p>
<p>You won't be penalized for errors your teachers made. </p>
<p>Though if they catch those errors it may not exactly help your teacher's credibility, I doubt they even notice. Even if they do, it's not a big deal, they are judging YOU, not the teacher. EXTREMELY minor.</p>