Simplify the following text for a Grade 9 native English-speaking person.
Original: Many of his theoretical articles from this period , such as Eisenstein on Disney , have surfaced decades later as seminal scholarly texts used as curriculum in film schools around the world .
Simplified: Many of his theoretical articles from this period , such as Eisenstein on Disney , have been found decades later as important scholarly texts . These are used in film schools around the world .