Hi, this is a very worthwhile endeavor. Dr. Heidi Hayes Jacobs is one of
the leaders in this field. While she has a web site,the following is a
link in the ASCD web site from her book that gives some basics to mapping:
http://www.ascd.org/readingroom/books/jacobs97book.html#chap1
The biggest obstacle is getting all teachers on board.
Good luck.