|Dos Mundos is a Spanish text used by the Study Group in their first year at school. It's first appearance was in the Season One episode "Pilot"|
|Featuring: The Study Group
All the members of the study group are seen having the textbook in their possession in this episode.
|Featuring: The Study Group, Ben Chang
Troy's textbook had a drawing that the study group assumed was of Abed in it.
|"English as a Second Language"|
|Featuring: The Study Group, Doctor Escodera|
|Dos Mundos is a Spanish text book from the McGraw-Hill Higher Education company. The version seen on the show is the sixth edition first published in 2005. The title translation in English is "Two worlds". A new copy is sold for $8.95 on Amazon.