ACE Math PACEs 1062 4th Edition. We are selling these because we have switched to a more special educational curriculum for our students. These are excellent for self-paced schooling or homeschooling. These are brand new with the student tests still stapled inside. The revision dates may not all be the same as they were not always purchased as a set for our students. They are still in agreement with the 4th edition score key and to buy a brand new booklet would still be worded the same. This is only 2 of the booklets out of the 12 for the 6th level.