The School kids Rap by Josh Foster

There is a really good site to help you read a good poem:
http://www.loc.gov/poetry/180/p180-howtoread.html

tip 1: Just read like you are reading to yourself but out loud.
tip 2: Make eye contact with your audience.
tip 3: Look at the audience when you speak.
tip 4: Make your voice clear so the audience can hear you clearly.