Book excerpt: This mixed-methods study evaluated the integration of environmental education (EE) into school curricula across 5 public schools in Arizona, USA, from June 2023 to May 2024. The research involved 500 students (grades 6-8), 20 teachers, and 5 administrators. Quantitative analysis revealed significant improvements in students' environmental attitudes and behaviors across all schools (p < 0.001), with large effect sizes (Cohen's d > 2.0). ANOVA showed significant differences in attitudes and behaviors across schools (F(4,495) = 3.87, p = 0.008 for attitudes; F(4,495) = 4.13, p = 0.004 for behaviors) and socio-economic backgrounds (F(2,495) = 4.75, p = 0.002 for attitudes; F(2,495) = 5.12, p = 0.001 for behaviors), but not across genders. Qualitative thematic analysis identified key factors contributing to program success, including student engagement, cultural sensitivity, and inclusivity. The study demonstrates the effectiveness of a comprehensive, adaptable approach to environmental education in enhancing students' environmental consciousness across diverse demographics.