Science Friday is a weekly podcast (hosted on Sound Cloud) that features science stories spanning a wide array of topics, but most topics that are related to current news stories. As the name implies, new episodes appear on Fridays. You can listen to each episode in its entirety or you can choose to listen to the individual segments as featured on the Science Friday homepage. Here's a segment from last Friday's show.
Applications for Education
Science Friday has an education section that offers many free lesson plans. The lesson plans are generally connected to one of the Science Friday segments. You can search for lesson plans in the Science Friday education pages according to grade, topic, and the length of activity that you would like to do.