Here's a slide presentation I put together based on the illustrated idioms which regularly appear on the BBC Learning English Twitter feed. Learners can use the slides for self-study purposes, but I've given some suggestions below as to how teachers could use them in class. You can download the orginal PowerPoint file here, but be warned, it's 135MB!
1. If you download the PowerPoint, you can hide the idiom and get students to guess what it is based on the image alone (this doesn't work for all the idioms, but does for many). You could also turn this into a quiz.
2. Show students the image plus idiom and see if they can guess the correct meaning.
3. If you're using the PowerPoint slides, you can rearrange them, so that you have only business idioms, or animal idioms, etc.
4. Get students to create their own illustrated idioms and share them with their classmates (and the world) via Twitter or Facebook.
5. Many of the images also lend themselves to vocabulary work and discussion. For example, what's the origin of the idiom? You could also get students to present an idiom and explain its origin. You'll find a list of useful sites below.
• Idiom Site
• English Idioms & Idiomatic Expressions (UsingEnglish.com)
• English-language idioms (Wikipedia)
• 1000+ Most Popular English Idioms and Their Meanings (MyEnglishTeacher)
• English Idioms Illustrated (iOs app)