- Replacement assignments for Ben Hur, if you have the Signet Classics' unabridged edition.
- The revised edition of the Student Bible Atlas (copyright 2015, ISBN: 978-1-5064-0010-5) has 30 maps instead of 31. Map number 1 in the original is not included. So you will need to subtract 1 from each map number listed in the text assignments (i.e., for a reference to "Map 2" in the text, you would use Map 1). This applies to textbooks with any copyright date prior to 2020.
- The pages for the "Solar System Chart" activity (which begins in Unit 1, Lesson 3, Part 4) have been moved from the Astronomy Lab Book to the Student Notebook Pages.