Use this podcast lesson to familiarize scholars with the characteristics, history, and cultural implications of idioms. As part of the Walking Classroom curriculum, kids listen to a 12-minute podcast as they walk around campus. If you don't have the mobile resources, this can still be useful for the classroom: have kids do exercises as they listen so the rest of the lesson is relevant. Discuss the main ideas of the podcast, then give kids a listening comprehension quiz (included) to test their recall and inference skills. The podcast can be found online.