I've been using it for years with my 9th graders.  I have them all take the Evaluating Sources of Information test at the beginning of the year and record who had which code. I then teach a lesson in their science class that comes from the state (a CAPT "embedded task") on that skill.  I try to post-test them with the same test at the end of the year in English classes (it seems I usually miss a few). I let them view the correct answers at the end (if you close the testing session they can do that with their code).   Some of the teachers give rewards for the class with the highest average or most improvement.  I can try to compare individual students over the course of the year as well, but I haven't stream-lined that process yet.  That whole process is going to be one of my IAGPs this year (increase of 1 point in the raw score for the whole grade).