Regarding WK- their English teacher has been faithfully using just our materials and no other, and EVERY SINGLE STUDENT she taught passed, many with 5s and 6s! Some students who had 18 on ACT still took Workkeys and got such a high score, the school will get more points for their SPS score from those kids- because of our program! Other teachers used a variety of materials, ours were at their disposal, but did not use with fidelity, and they did not have as good results.