A Frindle quiz is a test provided for students based on the children's novel "Frindle" by Andrew Clements. Some resources to find such quizzes for the classroom and for personal use include softschools.com and goodreads.com.
The novel "Frindle" centers on the main character Nicholas "Nick" Allen, who is a fifth-grade student interested in words and where they come from. As a challenge to his disliked teacher, he decides to rename the word "pen," using the word "frindle" instead. What originally starts as a small substitution quickly becomes a national phenomenon as more and more people all over the country begin to use the word.