If there were an organized, well-funded movement to get fake "evidence" for Nessie inserted into high school biology classes, there would be.
Possible Nessie sightings appeared a time or two, I recall, during the course of my senior year biology. It was to the effect of "oh, some biologists think there may be something in Loch Ness accounting for the claimed Nessie sightings; here's a claimed picture, and here's what's being tried to locate it; some think it could be a manatee [accompanying picture and description of manatees]." Nobody got bent out of shape and no other attention was paid to it. But the mention fit the best in a biology class, not, say, social studies or history.