Hi, We have been in CC for two years now and have tried combining SOTW in two different ways. Last year, I tried to skip around in volume 1 to match our history statements, but ultimately I got bogged down in the jumping and felt as though there were gaps in our study. This year in cycle 2, I started with SOTW volume 2 (following it in chapter order) and am finding that we are all much happier treating the CC statements as memory work while using the SOTW for our history core. Actually, between SOTW, the history statements and the Veritas timeline cards I have found that my kids have an amazing understanding of historical sequencing.
Regarding the science, during CC we stick to the science statements. We read lots of books on the topics, create projects when applicable, and play games to ensure that we really learn about the subject matter in each statement. However, with CC only being 24 weeks long we add in the Apologia (K-5) series during our breaks and throughout the summer. The kids really don't see that as school since the projects and activities are so much fun.
Most of the families at my campus follow the suggestions that I have outlined as successful for us. In our experience the combination of the SOTW study, quick CC memory work, and Veritas oral timeline have been wonderful.
HTH?