A student wrote this letter to their teacher, who proceeded to edit it like any submitted written work in an English class. Pretty nicely done, though I wouldn't leave the end comment about "looking stupid"
The teacher went through and sliced and diced the letter in red marker, noting everything from not having a date to not indenting the signature line to a comma splice.
See the letter below. Note: Some readers might find some of the language offensive.
Source: WGNTV and Reddit