I want to ask you if the cinema could provide some extra services to the community, such as showing educational films for free.

educational 是形容词，由名词 education（教育）加上后缀 -al 构成，表示"与教育有关的"或"具有教育意义的"。educational films 指"教育影片"，即具有知识传授或道德教化功能的电影。