Scholastic - National Poetry Month: Everything You Need
CCSS ELA Appendix B: contains poetry examples and sample tasks for poetry
NYC Dept. of Education Poetry Resources - click the "Poetry Resource" page for poetry units for each grade level.
Writing Poetry with Writers - Study the genre of poetry by taking part in step-by-step workshops with favorite writers. Site includes the "Poetry Idea Engine" where students can create and print their own poems.
Poem in Your Pocket Day - April 24, 2014 is the national day to celebrate poetry with this easy classroom project.
Giggle Poetry - Lots of funny poems for students to read and rate; also poetry "theater" - poems for students to perform.
The Teacher's Guide - lots of links to poetry lessons
Lucy Calkins K-3 Poetry Resources - detailed information in your Units of Study