Night of the Undead Frogs - Katie Schenkel - Bog

Billy's 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.