Those are pretty small essays but small can be hard.
Winston Churchill said he wrote long letters because he didn't have time to write short ones.

Good luck with everything my lovely dear! An all day exam sounds knackering, pour yourself a glass of wine pretty lady.
( TFD is sporting this season's finest necropants, Fri 15 May 2009, 0:06, archived)

I had a large G & T when I came out.
We all came out of the exam room and straight into the nearest pub. The two short ones are on employment law, which I don't mind but want to get right.
( The Cat's Mother Not a People Person., Fri 15 May 2009, 0:07, archived)

Do you write loads and then cut it down?
I take ages and do it slowly but try to get it done in one go. Some people on my course do 2,000 words for a 500 word report and then cut it back.
( The Cat's Mother Not a People Person., Fri 15 May 2009, 0:11, archived)

No, I try my best to be on target.
2000 for a 500 report is silly, clarity is the key with the little uns: why say it in a paragraph when a sentence would do? Especially if all the space you've got to say it is a sentence.

I think people forget with little essays and don't plan enough, if anything small essays need to be planned more meticulously than big ones because you've got less margin for repetition and waffle.
( TFD is sporting this season's finest necropants, Fri 15 May 2009, 0:20, archived)