<p>"If you need additional space, please explain using the upload function button below. Please do not refer us to an attached resume."</p>
<p>Does this mean we get to upload an optional essay? or is this just more space for the essay caltech requires?</p>
<p>We interpreted it to mean, any other information you would like to give the college about you for which there was no space on the app forms or that you had not already covered in your essay.</p>
<p>Son ended up explaining a few things about his school and listing some accomplishments and activities he was unable to point to or elaborate on earlier</p>
<p>Yeah, it's not "make up another essay and put it here", more like what theorymom described. Extra info that doesn't fit on the app.</p>