Bewitched - Season 8 - Eps 20: Tabitha's First Day at School
"I know that Tabitha is ready for school, but is school ready for Tabitha?" warns Sam. Tabitha attends school for the first time, and has a pretty hard time because a boy is messing with her. When he refuses to give up, Tabitha turns him into a frog. The teacher Miss Peabody gets on her about the frog and tells her to put it back in the class terrarium. Tabitha grabs the wrong frog and Samantha pops into the school and changes the frogs. When the right frog is brought home, Tabitha changes it back before the boy's mother finds out.
About Bewitched

Title: Bewitched
First Air Date: 1964-09-17
Last Air Date: 1972-03-25
Status: Ended
Rating: 7.861/10 (from 695 votes)
Language: EN
Seasons: 8
Total Episodes: 254
Network: ABC
Genres: Sci-Fi & Fantasy, Comedy, Family, Drama
Production Companies: Columbia Pictures Television, Screen Gems
Synopsis
Samantha Stephens is a seemingly normal suburban housewife who also happens to be a genuine witch, with all the requisite magical powers. Her husband Darrin insists that Samantha keep her witchcraft under wraps, but situations invariably require her to indulge her powers while keeping her bothersome mother Endora at bay.
Cast

Elizabeth Montgomery
Samantha Stephens

Dick Sargent
Darrin Stephens

Agnes Moorehead
Endora

David White
Larry Tate