This is a powerpoint that I used on the Epson BrightLink in a fourth grade class of ELL's to explain what idioms are and how they are used in the English language. This PowerPoint also gives students reading strategies to recognize and comprehend the idioms in a piece of writing.
The students followed along and the PowerPoint is interactive near the end to support the use of technology in the classroom. It includes ~a short passage that uses many idioms that the students can find and highlight or circle,
~a matching game,
~and a slide of "Guess the Idiom"
If you are looking for a fun worksheet to go along with this, please check out my listing for the Idioms worksheet. I used that as the assessment portion of the lesson.