You are going to LOVE this adventure with your kids. I have a 9yo son who helps me with our pullets that we got this summer, and it's such a fun bonding thing we do every day after he gets home from school.
I'm also a middle school science and geography teacher and there's soooo much you can do to teach content with your backyard flock If you need ideas while homeschooling, hit me up with the topic you're about to cover and I'll bounce ideas with you.