She's back and full of wisdom in The Best of Clarissa Explains it All, Volume 3! Clarissa's got a secret admirer, crazy Aunt Mafalda is visiting at the worst time, the school counselor needs some guidance, the Darlings are in a heated debate, and more!
Clarissa turns to her computer to help her finish an assignment for which she must write a poem. Not only does the computer "write" a strange but well-loved poem, but also Clarissa is chosen to represent her school at a banquet for young poets.
Sam's mom comes to town to play in a roller derby match. Although she is the "Most Valuable Slayer," she announces that she wants to quit the derby and take Sam back to Seattle to live with her for good.
Clarissa is broke and decides to get a job. She declines to use Ferguson's job placement business, but lets the librarian help her with her resume and job search. Clarissa gets multiple job offers, all of which she accepts.
Janet recruits the whole family to participate in Volunteer Day at the Children's Museum. Clarissa desperately wants to get out of this assignment and lucks out when the museum closes because of boiler problems.
Ferguson has fallen in love and is asking everyone for advice, including Clarissa, who wants to give him the worst advice possible. Yet every bad idea she gives him works in his favor and all the girls go crazy for him.
Sam sets up himself and Clarissa on a double blind date. Clarissa is beseiged by visions of a blind date from hell. But after Sam describes how cool her date is, she begins to think that she might be the geek.