Classroom Decorating Themes

decorating
Provide (a room or building) with a color scheme, paint, wallpaper, etc
(decorate) deck: be beautiful to look at; "Flowers adorned the tables everywhere"
(decorate) award a mark of honor, such as a medal, to; "He was decorated for his services in the military"
Make (something) look more attractive by adding ornament to it
Confer an award or medal on (a member of the armed forces)
(decorate) make more attractive by adding ornament, colour, etc.; "Decorate the room for the party"; "beautify yourself for the special day"

classroom
A room, typically in a school, in which a class of students is taught
a room in a school where lessons take place
A classroom is a room in which teaching or learning activities can take place. Classrooms are found in educational institutions of all kinds, including public and private schools, corporations, and religious and humanitarian organizations.
(Classrooms) Belk Hall, Reid Hall, Daniel Moultrie Science Center (DMSC)

themes
The subject of a talk, a piece of writing, a person's thoughts, or an exhibition; a topic
(theme) a unifying idea that is a recurrent element in literary or artistic work; "it was the usual `boy gets girl' theme"
An idea that recurs in or pervades a work of art or literature
(theme) provide with a particular theme or motive; "the restaurant often themes its menus"
The first major constituent of a clause, indicating the subject-matter, typically being the subject but optionally other constituents, as in “poor he is not.”
(theme) subject: the subject matter of a conversation or discussion; "he didn't want to discuss that subject"; "it was a very sensitive topic"; "his letters were always on the theme of love"