Use drawings, clipart, photographs, images, and videos (vimeo.com, schooltube.com, etc.) to illustrate your point, to introduce vocabulary words, and to build schema. 

​Also, younger students or newcomers may find it easier to draw their responses instead of writing if they are unable to write at the present time. Drawing a picture and labeling it with new vocabulary words is a great way for ELLs to start using their new language.

Google Images is my best friend.  If I need a visual for a particular word or idiomatic expression, I just type it into google.com and click on Images.  I can either print it out, or save it to my desktop to use on my SmartBoard.  I incorporate images into my worksheets and posters.