Night of the Undead Frogs (Scary Graphics)

Billy is looking forward to the frog dissections at school (so delightfully gross!), but his disrespectful behavior toward his teacher (whom he thinks is a witch) and the frogs earns him detention--so he sneaks back at night planning revenge, only to find that the dissected frogs have come back to life, multiplied, and are out to get their revenge on him.