<p>I sent Harvard two letters of recommendation, both teachers, one was from AP Chem, and the other from Global Studies.</p>
<p>The AP Chem one was lacking but the Global studies one was awesome</p>
<p>So then I sent them a third rec from a teacher that I had for Bio and Biotech and it was awesome. I sent it with my mid year report.</p>
<p>My question is, would it be annoying, unnecessary or anything at all negative if I sent them a fourth one, but this time from the Chief Engineer at the Naval Undersea Warfare Center's Unmanned Surface Vehicle department that I worked under during the summer?</p>
<p>Just curious, if anything helps, I will do it</p>