Thomas and David, along with a group of their friends, and David's Maths teacher, entered a team for the school's "Ultimate Frisbee" league.
I believe the basic rules are similar to football, or basketball, but played on a field (muddy is optional...but preferred).
Their team did very well, considering that they were a team with 7th to 10th graders, competing against teams with 11th and 12th graders. But their Math teacher was the team's secret weapon!
