Which award is given to the local chapter with the largest membership based on the percentage of school enrollment?

The Market Share Award is given to the local chapter that demonstrates the highest membership relative to the total enrollment of the school. This award focuses on the percentage of school enrollment, recognizing chapters that effectively engage and recruit a significant number of members in relation to their school's student body size. This emphasizes not only the number of members but also the chapter's ability to tap into the school's enrollment effectively.

In contrast, the Membership Achievement Award typically recognizes overall membership growth, the Outstanding Chapter Award focuses on various aspects of chapter performance rather than strictly on membership numbers, and the Chapter Growth Award is more about the increase in membership over a specific period without relation to the school’s enrollment percentage. Thus, the Market Share Award specifically targets the efficiency and effectiveness of recruitment efforts as a function of the school's population, which is the key differentiator for this recognition.