The SCM outline for history is done chronologically over six years. If you feel they need some US History before high school, or if that is what they are interested in, you could use module 6 next year, or even shorten both modules 5 and 6 into one year, for a brief overview. The following 2 years you could cover modules 1-3, which would cover the ancients. Again, shorten each module a bit. Then in the older daughters final 3 years you could cover modules 4, 5, and 6, one per year, as written.
I am not familiar with TQ – would it work to adjust the curriculum to fit your needs?