This is my first post, so I will start with a quick intro. I have 5 kids from age 2-9 who I have hs'ed from the beginning. I mixed and matched to design my own program fairly successfully until this year. But this year, I started to feel like I was drowning. After much prayer and discussion with dh, I decided to ditch what I was doing and purchase Bigger. My 7yo and 9yo are 1/2 way through Bigger and this is the best year we have ever had!
That brings me to my questions. Bigger is a *perfect* fit for my 7yo ds, but my 9yo dd needs a greater challenge (she is using extensions minus Planet Earth). This leaves me with two options going forward: 1) I could continue to add extensions, while doing math and grammar on her level. I would probably need to add a writing program for her, too. I am not completely comfortable with this because I feel like I am letting her "coast" but she isn't complaining.


Any advice in this scenario?
What goes into the decision to have kids in a different time period? Do you feel like you are missing out on learning together? I'm sure this has been discussed before, so I'd appreciate any thoughts or links to past threads.
Thanks in advance!