Charlene,
You are so quick about noticing changes in the "Preparing..." packages!

Aesop's Fables that was scheduled in the Deluxe Package went out of print, and "If You'd Been There in Bible Times" is also scheduled to be out of print eventually, so we had a few changes! We're actually very pleased with the changes to the Deluxe Package and feel that they are even better than what was previously scheduled, so it is a God-driven change!
As far as the science in "Preparing...", we have decided to leave it as is for both younger readers and for older readers. This is because the books in the science package are all targeted at ages 8-12, so they fit the extension pack range as well.
If kiddos in grades 5-7 haven't already used Tiner's "Exploring Planet Earth" in "Bigger..." that could be added to "Preparing..." once a week if desired. Another option for 7th graders would be to add Tiner's "Exploring the World of Chemistry". Also, we felt that some older kiddos who may be especially science-minded may want to add their own topics of study based on interest if desired, so this would give them a chance to do that (but is not required).
For the Extension Package for history, you can easily add books from the younger package to the older package. The schedule for the Extension Pack readings will be in the Appendix. The directions and schedule for the Deluxe Package history readings will be on the left side of the daily plans each day.
Blessings,
Carrie