Betsy feels pressured by a school assignment to draw a picture of what she wants to be when she grows up; Mrs. O'Connor teaches the children the difference between fiction and nonfiction, and assigns them to write stories.
The children learn compass points (north, south, east and west) and go on a treasure hunt on the playground. After school, they continue the fun with a treasure hunt in Billy's backyard. Then the kids become teachers or administrators for a day and Betsy and Newton split the duties of the principal.
While the class learns about size differences, Bus Driver Bob believes his bus has shrunk after it's moved and a toy bus is left in its place. Then Betsy and her friends come to the rescue when Principal Warner has computer problems.
The class learns proper manners for a Parents Day tea party. Later, the class visits a farm, where the kids classify and organize the animals; and Betsy investigates when Bus Driver Bob's apples keep disappearing.
Molly learns to ride a bike in order to take part in the class's bike parade. Also: after Kenji tells Molly and her classmates that thunder is made by giants, they become scared during a thunder storm.
While taking part in Mrs. O'Connor's spelling game, Betsy learns a lot about the letter "U." Later, Betsy bails out Bus Driver Bob when he forgets the recipe for pancakes prior to the school's annual pancake breakfast.
Curious as to what Mrs. O'Connor does when she's not in school, the kids spy on her---and decide that she must be a spy herself. Also: Betsy brings her imaginary friend, a penguin named Pauly, to show-and-tell.
Betsy and Scott collect information on the environment after they're made their class's "Weather Watchers." Also: Betsy learns that hopscotch makes good exercise while Sarah learns a lesson about teamwork.
On a class trip to a farm, Betsy finds herself caught up in a mystery---disappearing baby chicks. Also: after a trip to a plant nursery, Betsy and her class grow plants, but Betsy's doesn't appear to be growing.