Hi Shannon, and welcome to the HOD Board!

I'm so glad you and your dc are enjoying Bigger Hearts. It sounds like a wonderful year - congrats!

As far as looking ahead, your oldest dd will have several options with HOD. HOD purposely is offering several paths through high school, so we can choose a pacing best fitting each of our dc. For your dd, she could do the following...
Bigger Hearts - 5th
PHFHG - 6th
CTC - 7th
RTR - 8th
RevtoRev - 9th (first half of American History; already include Advanced Physical Science high school option; can do DITHOR 6/7/8 with high school titles/R & S English/writing for English credit)
MTMM - 10th (second half of American History)
World Geography - 11th
World History - 12th
This would meet her history credits, and there are ample ideas for beefing up science for MTMM already for high school. The rest of the years would already be high school credit worthy for science, history, English, electives, Bible credit - math you'd just choose the appropriate levels and pacing for dd. So - no need to skip anything unless you want to separate dd because you feel it's a better placement for her. HTH!
In Christ,
Julie