Hi guys. I'm so glad to announce that article about Specification Pattern was picked for RubyWeekly #341. Also article Decoupling From Rails [Part 1] started just awesome discussion on Reddit. It means that we're moving to the right direction. I'm going to finish my series of articles about Decoupling From Rails soon, but today would like to talk about modules. How to add class methods and instance methods by including one module into class.