Both of these feeds change daily. The feed to the left contains audio poems provided by The Poetry Foundation; the feed to the right, from the same organization, contains poems for reading.
Strongly recommended is Poetry Daily, now in its 15th year. Every day, the site has a daily poem, poet, and journal.
A Poem A Day For High School Students
For every day of the school year, a poem, from the Library of Congress and Billy Collins, former Poet Laureate of the United States: Poetry 180