Has anyone used the Milliken History of Civilization series as a spine for World History? There are 12 workbooks with about 25 lessons each, but some of the lessons are just one page of reading. Most lessons have one or two essay questions, sometimes a longer writing assignment or map work. Also, there is a test mid-way & at the end of each unit. If I add a reading assignment, with each workbook, it looks like it would be a pretty good World History class for 9th or 10th grade.