Based on the text, what does the word “delegation” mean? Why might Lee describe the group of students as a “delegation”?

"Delegation" refers the large group of people in Maycomb that would rely on Scout to explain Maycomb culture and people to Miss. Caroline,

I turned around and saw most of the town people and the entire bus delegation looking at me. Miss Caroline and I had conferred twice already and they were looking at me in the innocent assurance that familiarity breeds understanding."