I'm not saying it isn't truth (as it fully is), only that it wasn't the assignment. Not following directions doesn't deserve praise. What message is conveyed to the others who did follow directions? If I had done something like that in one of my creative writing classes, I would have gotten (and deserved) a zero.
I will cede that the drawing may be real (I've actually seen people draw like that - and quickly too). It was that the identical font that all the "human writing" was written in that made me suspect AI. The odds of both the average teacher AND student writing like that are astronomical (not to mention that the student didn't use their last name (which is required in all middle school through college classes), nor is there any sign that it was redacted).