As part of my word work center, my students learn common idioms. This is especially important for my students, with English being the second language for most of them. It is funny to my students that idioms aren't taken literally!
My students study two idioms a week, which are posted on the board. The students write the idiom, its' meaning, use it in a sentence and draw a picture of it. There is a column for teacher approval since I check their word work weekly. Enjoy!