Hi Michelle. Not sure what graduation requirements are where you are at, here we need a year of World History and a year of American History, plus government and economics – half year each. I think a nice plan is to start with Matthew to Acts and Rome. That would put you in the Early Modern study in 6,9,11. And Modern 7,10,12. Early Modern and Modern are worth 1/2 credit World and 1/2 American, which would fulfill graduation requirements, the Rome and Middle Ages would be electives. It would look like this:
Matt-Acts/Rome 4,7,9
Epistles/Middle Ages 5,8,10
Epistles/Early Modern 6,9,11 (both high schoolers earn 1/2 World credit and 1/2 American)
Epistles, Revelation/Modern 7,10,12 (both high schoolers earn 1/2 World credit and 1/2 American)
Not sure if that helps or confuses… Your youngest would cycle back through.