What are we waiting for?

As I read "I Just Need to Draw" I could not help but thinking, "Here we go again." I mean this with the least negative connotation as possible, but I feel like intertexuality is a subject that has been researched and proven to increase learning. So what is the hold up with putting it in the classroom. I have talked to my co-op and other teachers in the building, and they have told me that the curriculum is not built around bringing in supplemental sources or activities. This does not stop those teachers from adding intertexuality readings and activities to their lesson plans, but why should they have to decide to do that on their own? When will districts begin to take the research to heart and make intertexuality practices the norm in their curriculums? Short, Kauffman, and Kahn discuss how students can find new ways to represent ideas and signs in classrooms across the board. On page 162 the article explains, "Math is the one sign system that many teachers don't believe is connected to literature response. When Leslie taped her students' discussion about literature, she found many examples of the use of mathematics to understand books." In almost every case I have read about researchers are finding that when students are introduced to content area through a variety of methods and practices those students learn more effectively. So I ask again, what are we waiting for? When will administrators and curriculum writers for our districts use literature response, intertexuality, and other various methods of bringing subjects together to study curriculum across the board.