Cerenity, you can ask to put up a bulletin board...sponsor a poetry writing contest...depending on the age of the kids, it might be fun to do a 'poetic poster' display..art and poetry go together so nicely.
Contact the English teacher or Principal. Ask if they would be willing to let you do something like this, then create some interest...if you do the bulletin board, start out in mid March by putting up one word....in the center of the board..then a week later, another word that rhymes with it..then another...until you get a small haiku....this will create interest...then post poetry....or have a poetry 'open mike'.. a get together where everyone can stand up and read his/her poetry. Get the local poets involved (if there is a group).
Or if you read Marge's idea below, try something like that!
contact me via email if you want to talk more about this: email@example.com