["I'm a teacher, and am back at school in just 2 weeks.", "I hope you're coming back into a great school. I'm sure the kids will be excited to see you.", "I've already done a lot of my planning.  Helps when I've taught the same grade twice before."]
That's excellent. I bet you're going to have a great year, you seem well prepared!
School starts back in 2 weeks.  I'm feeling very ready for the new year as I have taught the same grade for 3 years now.