<p>I know it's absolutely too early to be worried that stuff hasn't arrived at MIT. However, my teachers sent their recommendations and the school report before I have even sent in my Application 1 Form. Is that problem?</p>
<p>I almost can guarantee you it won't be a problem. It takes time for stuff to arrive there - and even if it gets lost in the mail (worse case scenario), MIT Admissions isn't that stringent on their deadline policies (they'll understand).</p>
<p>it shouldn't be a problem, as long as your teachers used the right forms, because they contain the identification info to open up a applicant file for you.</p>