Thank you everyone for your posts. We are currently looking through the SOTW4 and figuring out if we can pick and choose things that would be good for K/1st OR to just do unit type studies of American History. Our co-op does separate out in different classrooms so each grade is their own classroom of 8 students and a teacher. We do 1 hour of history and 30 min geography related to history. Students read or listen to 1-2 chapters ahead of class and classtime is spent on read alouds, notetaking (as age appropriate), an activity and then the geography time is for the maps. So for us getting read alouds and activities for the younger age is hard since the activity guide isn't geared towards the youngers for Vol 4. It was ideal for us to cycle through K-5th SOTW and 6th-8th switch to Mystery of History but covering the same time periods so when we are in SOTW 1 we are in MOH 1, so they point is if they are in co-op K-8th grade they will cycle through the time periods more than once. Since I have kids spanning K-6th, I'm trying to help make it so we are all covering the same things for my own sanity.