: In early episodes like " Match Maker ," Miss Skullnick is shown grading test papers and pop quizzes.
: In a separate episode, " Sleep Spells ," Marco uses a notepad and a psychology book to test Star. [S4E17] Meteora's Lesson
: The book first appeared in the Season 1 episode " Mewnipendence Day " where Star Butterfly used it to explain the history of Mewni from a biased perspective. : In early episodes like " Match Maker