Eighth-grader Zack runs into a ninth-grader (Carla Gugino) he met during the summer -- and lied to about his age.

Complications of the romantic kind ensue when Miss Bliss (Hayley Mills) intercepts a love note intended for Lisa (Lark Voorhies).

Zack (Mark-Paul Gosselaar) bullishly hopes he can make enough money on the stock market to pay for damages done to his father's VCR.

A student's refusal to dissect a frog in biology class sparks a controversy among her peers.

Zack (Mark-Paul Gosselaar) won't admit it, but he's disturbed by the chemistry between his father and his teacher.

The gang encourages Screech (Dustin Diamond) to stand up to a bully, unaware of the reason behind the boy's tough exterior.

At a school mixer, Zack encourages a friend to ask a girl to dance -- but the girl would rather dance with Zack.

Principal Belding (Dennis Haskins) smells a rat when the school is plagued by rodents just as Zack is due to take an important midterm.

An argument among students over a class project helps Miss Bliss (Hayley Mills) clear up her differences with a longtime friend.

From junior-high days: Screech is "tried" for pulling a prank on Miss Bliss (Hayley Mills).

From junior-high days: Zack bets he can plant a kiss on a pop singer who's giving her final performance at school before going on to college.

Anxious to click with a cool campus clique, Zack agrees to insult his friends -- unaware that he's the victim of a prank.

Principal Belding (Dennis Haskins) disapproves of the unconventional teacher substituting for Miss Bliss's history class.