Chimps was a four page "essay" written by Greg. The teacher had told the class to write an essay, but Greg couldn't write one so he went to the computer lab before in the lunch break and messed with the font size and made anything to cover up the four pages. He said his teacher would probably catch him, which is definitely possible since the title page usually doesn't count. It appears to be more like a comic or little children's story instead of an essay.