The days of school books and pencil cases may be drifting into distant memory, but that doesn't mean we don't get nostalgic for them as the first leaves start to drop. In fact, we've grown a bit envious of those who still get to devote the better part of the year to growing wiser. (What, with all that spare time to "study" and all.) So, to even the playing field, we've put together the ultimate back-to-school guide full of must-have items on everyone's checklist — whether you're a teacher or student. The best part? All 20 pieces (and we're talking everything from pens to biker jackets!) are under $50. See, you don't have to actually be a student in order to spend like one.