We went on to Conceptual Physical Science Explorations. Overall the kids have really liked the Hewitt videos online and the text is not to hard to follow. I will say that the answer key is terrible. I find multiple typos (wrong answers) in almost every chapter. The text also has some problems (like showing the same circuit diagram twice and calling one image a simple circuit and the other a parallel circuit). Also, I have tried to use their lab manual and found it very frustrating. Rarely are specific instructions given for how much of a supply you need which makes compiling a purchase list a real challenge, and they just assume you know things a science teacher would know (like how to set up your multimeter to be an ammeter not a galvonometer) and I am constantly googling stuff trying to figure out what they mean. Not to sound overly negative on it, because it is working out okay, but those are my first thoughts. I don’t know if this is just par for the course with science textbooks or what. I used two CPO textbooks and found errors all over the place in them too.