This is the first and only appearance of Juanita, who is new to Mrs. Jenkins class.
We learn in "Making New Friends" that Grace doesn't like almonds.
In "Be My Valentine," Lily said she was finished working on Charles' valentine, but she forgot to color in the star she drew.
In "Charles the Athlete," from far away, when the Franks leave the tarmac to find Charles after kicking the soccer ball, the pylon that Charles took suddenly reappeared.
In "Charles the Athlete," Frank #2 could've noticed earlier that Charles was missing when kicking the soccer ball because he took one of the pylons.
The items placed in the class time capsule in "Just in Time"
Timothy: a moon snail shell
Claude: photo's of his trophies
Nora: a noisemaker from her birthday party
Charles: a castle made out of toy blocks
Doris: an abstract painting
Fritz: a toy rocket ship
The Franks: two cans of Franks and Beans
Yoko: an origami crane
Grace: her favourite ballet slippers
Lily: Thimbelina (later a painting of Thimbelina and a photo of Henry)
A class photo was also added.
In "Just in Time," we learn that Mrs. Jenkins' name before she got married was Ms. Abercrombie.
Nora mentions in "My Family" that she has a big sister called Kate, who is in the third grade.
The piano music Grace dances to during "In the Spotlight" and in her ballet class before she fell is the music of "Dance of the Reid Pipes" from Tchaikovsky's Nutcracker Suite.
When everyone is applauding Fritz's experiment in "Professor Fritz," Charles' hands are gray instead of their usual pink.
The items found by Mrs. Jenkins class as they go in search of Yoko's Netzke family in "Lost and Found" were:
Frank #1: a door from Frank #2's truck
Frank #2: the steering wheel from Frank #1's truck
Fritz: Lilly's lunchbox
Timothy: Nora's mitten
Charles: Grace's scarf
Nora: Fritz's magnifying glass
Glitch: In "Full of Beans," when the Franks scared Lilly and she dropped her paint, the blue sky in her painting turned white as she looked at them. But when she looked back at the mess she made, the sky in the painting turned blue again.
During the first segment, we learn that a "taketombo" is a Japanese toy known as a bamboo dragonfly.
From this episode onward, Fritz wears a new set of clothes.
This is the first and only time within the series someone moves away from Hilltop school, adding authenticity to the story.
The going away presents the kids give Fritz in "Fritz on the Move" include:
Timothy: his favourite seashell
Yoko: a branch from her cherry tree
Claude: a picture that he made of the school
The Franks: a can of franks and beans (they had two but they ate one of them)
Doris: one of her paintings
Grace: a poem she wrote
Lilly: a ribbon that Fritz can tie around his finger so he doesn't forget her
Nora: a megaphone (or as she calls it, a "talking tube")
Charles: a bug collecting jar
Mrs. Jenkin's injury is much like Skunk's injury from Franklin.
In "Timothy's Way," the kids plan to teach the class the following:
Grace: ballet steps
Fritz: how static electricity works
Claude: playing the saxophone
Lilly: magic tricks
Charles: drawing cartoon faces
The Franks: football moves
Yoko: origami (a Japanese form of paper folding)
Timothy: playing marbles
"Taking the Plunge" features the first instance that Claude and Timothy work together, rather than Claude serving as an antagonist.
"Taking the Plunge" marks the first time Claude isn't good at something.