Another typical Spongebob that is about Spongebob playing a trick on his substitute teacher. A small lesson in what could happen if you don't tell the truth/why not to play tricks at school, but nothing really life altering. An okay book.
SpongeBob is worried about missing Mrs. Puff if he graduates school. He misses her when she is absent one day. He switches with another student for the sub. And the sub passes his test! Causing all sorts of confusion for everyone.