April is National Poetry Month. The holiday, started in 1996 by the Academy of American Poets, encourages children and adults to make some time for enjoying poetry. Their site contains tons of ideas and resources including 30 Ways to Celebrate, a page of poetry lesson plans and a poetry Teaching Resource Center.
If you love Shel Silverstein as much as I do, you'll want to check out the Shel Silverstein website which has a page of Poetry Month activities like Don't Bump the Glump! character coloring
and another page of Kids' Poetry activities.
Scholastic has a full page of resources for celebrating Poetry Month like the Poetry Idea Engine where students can practice haiku, limerick, cinquain and free verse in a simple, fun format. There are also bunches of writing prompts, puzzles, and even 8 more pages of Shel Silverstein printables.