Rana Haugen, who plays Slater's younger sister, is actually five years older than Mario Lopez in real life.
Samuel "Screech" Powers (Dustin Diamond) does not have a sister. Although he confirmed he's an only child, in Good Morning, Miss Bliss (1987), he mentioned he has a brother, but that series is non canon to this series.
The Five Aces sang "Come, Go with Me" at their high school sock hop. The song was originally recorded by The Del Vikings in 1956 and released on Fee Bee Records. The song peaked at #4 on the Billboard Hot 100 chart.
Bayside High School's 1950's themed school dance was marketed as a sock hop. A sock hop was an informal sponsored dance for teenagers of the period which spotlighted popular music.
Like her brother A.C. Slater (Mario Lopez), J.B. Slater (Rana Haugen) is known by her initials. Unlike A.C., J.B.'s initials were never revealed what they stand for.