text: It's sort of an abstract concept for kids to grasp, but it's not out of the question.  It TOTALLY helped me by recognizing cognates in my spanish classes.  I understood English better that way.  \n\nI've taught my students (3rd grade) prefixes & suffixes, and they catch on to that with relative ease.  \n\nIf studies haven't been done, I might start my own next year.  :)