<p>I don’t think any schools expect to receive everything all at once - especially Common App schools. Potentially, you would submit your common app and supplement, your counselor would submit counselor recommendation, your registrar would submit your transcript, one or two teachers would submit recommendations, and one or two testing agencies would submit test scores. Obviously, with input coming from all these different sources, the colleges have to be able to routinely handle receiving things at different times.</p>