• Make sure they have correct punctuation.
  

there should be periods at the ends of sentences!

• Make sure they have correct spelling.
  

if you're not sure yourself, circle it, write 'sp' next to it, and have them look it up

• Make sure they have appropriate capitlization
  

If you see more than two instances where something needs to be capitalized, hand it back to them and have them edit it themselves to find all the instances where there needs to be a capitalized letter.

• Be sure they include transition words
  

then, next, first, finally, about

• Be sure they include conjunctions
  

and, so, because, but

• Give suggestions that will help ideas flow together better
  
• If somethings sounds awkward, write a note to suggest rewording it
  

marvelous,fabulous, special, spectacular, fantastic, incredible

gonna

going to, will

big  

huge, humongous, enormous, giant, gigantic, gargantuan

bad  

rotten, evil, dangerous, villainous, naughty, hideous

little  

tiny, puny, teeny, mini, miniscule, midget, shrimp

cool

awesome, amazing, smooth, terrific, wonderful, perfect

very 

really (use 1 time!), totally, extremely, awfully, amazingly

received, bought, was given, rented, borrowed, picked up

said

declared, agreed, explained, yelled, whispered, snapped, shouted, argued

went

slithered, strolled, tripped, crept, drove, skipped, raced, scooted, sauntered

made

created, constructed, built, composed, produced, manufactured, designed

okay

average, mediocre, not too horrible, fairly well, agreeable

saw

noticed, viewed, gazed, inspected, glared

nice

kind, perfect, sweet, caring, pleasant