Oh yes. Very frustrating, isn't it? You've put in the effort to meet your deadline, and then everyone else puts in the bare minimum of effort about a month later.
We had to complete two assignments for art class last term, and we had a few months to complete the work. How many people managed to get the work done on time? THREE. Out of an entire class. That wasn't the teacher's fault, though.
Something that annoys me a lot is when you work hard on a project or something, and then the teacher can't be arsed to give you a grade or any feedback at all. My history teacher is terrible for that, which is a shame because he's a good teacher apart from that one thing. History is my favourite subject as well, so it would be nice if I could get some feedback on the work I'm actually good at.
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'El reloj, no avanza
y yo quiero ir a verte,
La clase, no acaba
y es como un semestre"