It’s the first day of school in Shawnee Mission. Be careful out on the roads heading to work this morning, as you’re likely to find a swell of extra vehicles on the road taking their kids to the first day of school in Shawnee Mission. Classes start today for grades 1 through 6 as well as 7 and 9. Classes start Monday for grades 8 and 10 through 12. Kindergarteners join the mix on Tuesday.