Who orders the books for your school?
We looked at those one year, but we decided not to get them. I'm not sure of the company, but I could find out for you if you'd like.
We don't put the core content in our plan books, but they're in our lesson plans. Our plans are several pages long, detailed, and cover an entire unit. The plan books are just for our use for day to day stuff, and I, personally, didn't need the core content in there.
Our sixth grade teachers ordered literature books with the KY core content numbers in them. Pretty neat!