ApplicationHelper problem nesting other modules to it

Hi,

I am in the process of learning Ruby and Rails and I am having a
problem with some some helpers that will end up in a plugin. I have
defined the following, approximately:

module ApplicationHelper

  def foo
    SomeClass.new
  end

  module A
    def method_missing(name, *args)
      ....
      content_tag(...)
      ....
    end
  end

  class SomeClass
    include A
    def method_missing(name, *args)
      super(name args)
    end
  end

end

Now, the problem is that content_tag is not defined in Module A. I
have tried including into Module A various helper modules of
ActionView but it ends up not finding _erbout, so I gave out using
that route. I was wondering if there is another way to make my Module
A pick up all of the Helper methods of ActionView the same way that
ApplicationHelper does. Ultimately Module A and SomeClass will be
extracted into a plugin, but I wanted to test if what I am trying to
do will work at all... Any suggestions and workarounds would be great!!