Have you ever visited http://www.manythings.org/?It's really worthwhile if you want to improve your READING, LISTENING and PRONUNCIATION!!! Besides, you'll find many quizzes, word puzzles, slang expressions, grammar-activities and so on.
You can dowload the stories for your MP4, you can do different interesting activities that I'm sure these help you to improve. Don't waste time and take a look!!!
Interesting Things for ESL Students