Goofs

Predatory plants like the Venus Flytrap do not instantly snap shut as depicted, even though they have trigger hairs able to respond within a fraction of a second. This is because detritus falling from the trees above is of no value to a carnivore: instead, the plant will wait until a second hair is triggered up to 20 seconds later, and only then is the trap closed on what should be a living victim. However, this scene takes place in a classroom full of vampires, werewolves, sirens, etc., so some leeway is allowed for fantasy.

At the train station, Rowan steps into a restroom with a sign labeled "toilets" above it. Restrooms in America, where the series is set, are not called "toilets," betraying the show's European filming location.

Principal Weems refers to Edgar Allan Poe as "Nevermore's most famous alumni." As any higher educator should know, alumni is the plural of alumnus or alumna.