I think that this is a great science book for 3rd-5th grade range. I decided to buy the book because I also have an accompanying workbook that I bought at a library and I like to supplement my children's education with extra work at home. I would reccomend this book to any parent who tutors or homeschools their children.
I decided to buy Harcourt Science because I was looking for a science book that did more than whet the students appetite. I've tried some of the top science programs and was not satisfied because we always had to look for more books and make each chapter into a unit study. Needless to say this was a very time consuming subject.
I tried Harcourt Science Grade 4 and absolutely loved it. It is a little more intnesive and provides workbooks that you can purchase to give each subject more meaning. I now own Grades 1 - 5 Harcourt Science. After trying Harcourt Science I need to look no further. It is a great series of science books.