Apologia is made to be used for various grades. A set for elementary, upper grades, etc. I've rec'd one of the books and know that I can tailor it to meet the needs of my 2nd & 5th graders. At the same rate, is a little less work, time & confusion for myself (I feel that may be stated a little too strongly, but I hope you get my drift). I've been looking for a Social Studies curr. that meets that similar approach. I had posted for advice on getting SS curr. recently and was met with one of the choices I had been considering. STILL undecided, I'm coming to you again. What programs, if any, are tailored to meet the needs of various grade levels simultaneously? I don't mind books, like Apologia, that give projects at the end of each chapter, and I don't mind making worksheets or tests to see how they handled the info based on what the book teaches.