Different Classes for Different Ages?

I just got the Homeschool version for my four kids (K - 6th). I initially added them all to one class for the typing exercises, but see so much additional activity for grade specific curriculum. It suggests I not add them to different classes. Should I have each child in a separate class if I want to take advantage of the common core and vocabulary lessons?

It doesn’t really matter it just depends on their grades :grinning: