I would like to write an includable method tracker, which logs about added methods to a class. module MethodTracker def self.method_added(method_name) puts "Tracking #{method_name}" end end class Factory include MethodTracker def build end end This is my code, however when the `Factory` class is defined there is no message shown. Can you give me a hint? Kenny Meyer I make Software. www.kennymeyer.net | +(595) 982 52 74 11