"Playground Literacies"

I believe there needs to be a bigger emphasis on "playground literacies;" the spoken and written expression in this "framed" space is often very authentic and reveals differentiated literacy skills of a child. However, these skills are less acknowledge than literacy skills from multiple choice tests given to 7 year olds? What is the role of authentic literacy, literacy that responds to one's environment, in this age of testing, "accountability," and one size fits all teaching?