Well it's not that my son doesn't enjoy Teaching Textbooks, he really does like it. In fact I have three children using it (we have used it for 4th-7th grade) and they all do very well with it and have all had great testing scores in math. The reason I was thinking about switching is that my son is very mechanically minded, he loves working with his dad fixing machinery and building things. It seemed like CLP math focused more on the real life aspects of using mathmatics. While TT has great word problems, very humorous in fact...that is why the kids love it. But my son is getting older and I want him to be able to apply mathmatics to real life in work and life skills. So that is one reason why I was thinking about switching. Also that TT is quite a bit more expensive, but then again I can use it with all the younger children when they get older. They also have excellent customer service. I am not liking the fact that CLP only has updated through Pre-Algerbra. I had not noticed that before. So I'm still thinking. Thank you for all your views.