Sabrina: The Animated Series (1999)

Season 1: Episode 39

A history teacher assigns Gem and Sabrina together as partners on a project on Rome. Gem becomes snotty though and hides the book on Rome in the spookie jar causing them to actually go to Rome. They are at first pitted against each other by Juilus Ceaser to fight but when it comes to going back home that's something they both agree on. They go back finish the report and Gem gets a brainwash, but in the end Sabrina discovered they made a great team.