Volume 6 of Charlotte Mason's Original Homeschool Series paraphrased sentence by sentence into plain English by Leslie Laurio. If you can only read one volume of Charlotte Mason's series, this should be the one, since this volume details the long-term vision and goals of CM that parents will need to understand the why's of the method, as well as covering curriculum considerations for all ages. You can also read this book online for free at http://www.amblesideonline.org/CM/ModernEnglish.html