The Academy of American Poets is once again offering a free poster to U.S. schools, libraries, community centers, and bookstores for National Poetry Month, which takes place in April. Details here. Among the Academy's other resources is a list of "30 Ways to Celebrate" the month. I liked this one:
Put a poem on the pavement
"Go one step beyond hopscotch squares and write a poem in chalk on your sidewalk."
P.S. The Academy tweets under the name PoetryNYC. ("Tweet" is the verb form of Twitter. But you knew that, right?)