I do a 4 year cycle. We have used different things as the spine or guide…but basically, we do:
Creation to Christ
Rome to Reformation
Exploration to 1850
1850 to Modern – I don’t start this unit until 6th grade, so we sub out a year of Geography for the younger kids during this time
I have an almost completed index of books broken down by these time periods, some of which we own, some we check out, and some I am still on the hunt for!
You could absolutely use the SCM guides, but you would have to compound lessons as the other ladies have suggested.
Basically, if you have a history spine, you can add living books to wherever your studies are taking you. All Through the Ages would definitely help to find resources relating to the time period you are studying.
Every year, I remind myself, “There is no magic curriculum!”. There are lots of options that you can use to fit your family. Some of them are going to fit you better than others.
I like structure, so I use a guide usually – but I adapt it a LOT and add in books from our list. That might work well in your situation. Just remember to go to a deeper level of knowledge every time you pass through the time period, and you should be golden ;-).