Idioms

http://www.idiomsite.com/

-Offers historical information and explanation about the idioms themselves

http://www.eslcafe.com/idioms/id-mngs.html

-Examples

http://www.idiomconnection.com/

-English idioms

http://www.funbrain.com/funbrain/idioms/

-Paint by Idioms game

http://www.readwritethink.org/materials/idioms/

-Interactive lesson