It is no more difficult than teaching multiple grades with any other curriculum. It took us a few weeks to get into a good rhythm and for me to figure out how long each child needed for certain things. My older kids are in 5th and 3rd grade. The majority of the TGTB curriculum they can do on their own. I will help them with spelling tests, dictation and also working through things that are a bit trickier. First thing in the morning they will cover everything that they can work on independently. During this time I am able to work more one on one with my Kindergartener and 2nd grader. I'll be doing a separate blog post and Youtube video later on with what a normal homeschool day/schedule looks like for us. I do love that the daily prep time is minimal for their language arts programs. The math box did take a bit more time to prep and also to work through with the child. I found that their Language Arts books worked super well when trying hard to juggle multiple grades. The math program felt a lot trickier to work with multiple grades at the same time. It was very hands on for the teacher which might work better when it is just one student at a time.