[quote=@Vilageidiotx]
There are three secrets to writing a good A+ essay.

1: Agree with the teacher, even if you don't. Listen to your teachers and get a good idea of what their opinions are about the subject they want you to essay, and then play up their confirmation bias.

2: Fuck around with spacing and shit. Even the smallest, most difficult to measure change in word spacing or margin size will gain you significant page length. 

3: When it comes to fluff, use your creative writing skills to make the fluff seem less boring. If you can pull off humor in a professional way, do it, because your teachers appreciate something that isn't shitty and dull after reading thirty other essays that are probably mostly shitty and dull themselves. 
[/quote]

Number 3 in particular. "Style" is almost as important as content most of the time, partially for the reasons Village mentioned, and partially because it makes the marker think you're eloquent and articulate and they subconsciously lend more credit/consideration to what you're saying.