When the shark bites on ‘Real Kids’; citizenship on ‘Virtues’; what if your mom and dad were bikers?

The meaning of citizenship is the central theme explored on an episode of Adventures From the Book of Virtues (KCET, Sunday at 9:30 a.m.). For ages 6 to 14.

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A 12-year-old girl vacationing in Daytona Beach, Fla. is attacked by a shark while swimming in waist-deep water on Real Kids, Real Adventures (Discovery Channel, Sunday at 10:30 a.m.). For ages 10 to 16.

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The gang at Thomas Edison High School can’t understand why Mags is so depressed on Student Bodies (Fox, Sunday at 3:30 p.m). Reason: She didn’t get the lead in a school production of “West Side Story.” She gets even more down when Emily wins $200 for an essay she wrote and Romeo’s band learns it could get a recording contract. She is so blue she writes a song as a release. And the next thing you know, things are looking up. For ages 10 to 16.

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The fact that Spinelli’s parents have never attended a school function creates suspicion among her fourth-grade classmates on Recess (ABC, Saturday at 7:30 a.m.). But on “Parent’s Night,” the gang meets her mom and dad, who turn out to be bikers. The show is part of “Disney’s One Saturday Morning.” For ages 8 to 12.

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In a two-parter, the gang from Bayside High volunteers to help Habitat for Humanity build a house for a local family on Saved By the Bell: The New Class (NBC, Saturday at 8 a.m.). Maria (Samantha Becker) becomes interested in Mike (Michael Strickland), one of the volunteers. But when she discovers he is part of the family the house is being built for, she starts treating him differently because she thinks he has no money. For ages 13 to 16.