Year 1 -- I just read the first two Story of the World books and Hillyer's Child's History of the World. Sometimes we looked at Usborne's Encyclopedia of World History
Year 2 -- Mystery of History: Volume 1 and library books
Year 3 -- Mystery of History: Volume 2 and library books
Year 4 -- Mystery of History: Volume 3 and library books
Year 5 -- All American History: Volume 1 and library books and Story of the World: Volume 3
Year 6 -- All American History: Volume 2 and library books and Story of the World: Volume 4
Plans for:
Year 7 -- What in the World is Going on Here: Volume 1 with Omnibus Book 1 as a reference
Year 8 -- What in the World is Going on Here: Volume 2 with Omnibus Book 2 as a reference
Year 9 -- What in the World is Going on Here: Volume 3 with Omnibus Book 3 as a reference
Year 11 -- Omnibus Book 5 or Worldviews of the Western World
Year 12 -- Omnibus Book 6 or Worldviews of the Western World