Here is another site from Voice of America. It allows you to listen to a text one sentence at a time. This way you will be able to practice your pronunciation and comprehension at your own speed.
At the end you will see texts and videos of Pres. Obama. You can watch him and see the words he is speaking. It's for advanced students, but go a head and try it. I think you'll enjoy watching him and really understanding what Obama is saying.
Here is another excellent site for listening & reading. It has a vocabulary quiz for each section.