<P> Rod Belding (portrayed by Ed Blatchford) is Mr. Belding's brother and steps in as a substitute teacher during junior year, after Mr. Dickerson has a mental breakdown . He initially makes a hip impression on the students because of his happy - go - lucky attitude, world - weary demeanor, and tales of defying authority and schoolwork . Rod arranges to take the students on the rafting trip for their annual class trip (ruining Mr. Belding's plans to visit Yosemite Park) and attempts to teach them about it . Mr. Belding is overshadowed by his brother's connection with the students, which is evident in a minor confrontation they have when Mr. Belding tells his brother he is not to be teaching the kids whitewater rafting on official class time . After Zack accuses him of being jealous of Rod, he soon finds out what he's really like on the inside . During a confrontation with the brothers, Rod tries to skip out of the trip just to meet a stewardess named Inga . Mr. Belding is furious that Rod would abandon his commitment to the students and orders him never to come back to Bayside . Rod leaves as Zack ducks behind some lockers to avoid his sight . Not wanting to upset his students, Mr. Belding claims that Rod is ill . However, when he offers to chaperone the trip instead, the students happily and gratefully accept . Zack, who had secretly overheard the incident, tells his principal that "we got the better Belding ." </P> <P> Becky Belding, Mr. Belding's wife (portrayed by Louan Gideon), is featured in the episode "Earthquake!", in which she, Zack and Tori get stuck in an elevator after a minor earthquake . During the time in the elevator she goes into labor and gives birth to the Beldings' son with the help of Zack, who becomes the baby's namesake . </P> <P> Richard Belding's niece (portrayed by Jodi Peterson) is blonde and bubbly, but no one wants to date her as she is related to the Principal . During Zack's sophomore year at Bayside, he earns himself a Saturday school detention . In order to be released from serving time and to be able to attend Kelly's upcoming party, he signs a treaty with Mr. Belding agreeing to take Penny out on a date on Friday in lieu of serving his sentence . After making this agreement, Kelly informs Zack that her birthday party would also be that Friday, since the Max was booked on Saturday . In order to make Kelly's party, Zack trains Screech to imitate him, so that he could take Penny out on the date instead; this works out well because Penny is attracted to Screech, but she angers Kelly when she says that she is hot for "Zack," thinking that was who Screech was . </P> <P> Richard and Becky Belding's son, born when Zack, Mrs. Belding, and Tori get stuck in an elevator . He also appears in two episodes of Saved by the Bell: The New Class . </P>

Who played penny belding on saved by the bell