Coefficients (estimates with 95% confidence interval) of NDVI of (A) March, (B) July, and (C) October in GLMMs.

The coefficients are adjusted for race (percentage of different populations at a school, including African American, Asian, Hispanic, White, Native American, Native Hawaiian, and Non-Hispanic), gender (percentage of female student), language ability (percentage of first language not English), income level (percentage of low income student), student/teacher ratio, attendance, and location (county of school) in generalized linear mixed models. *indicates P-value<0.05; **indicates P-value<0.01. Coefficients (estimates with 95% confidence interval) of NDVI of (A) March, (B) July, and (C) October in GLMMs.