Teacher burnout, stress, and anxiety are widespread issues in U.S. K–12 education and have serious consequences for student success. This report examines how these factors impair student academic achievement, increase classroom behavioral issues, and contribute to poor emotional well-being among students. Drawing on national surveys and peer-reviewed research, it argues that teacher mental health is not just a personal issue but a systemic crisis that affects the entire learning environment. Effective policy responses must prioritize teacher support, professional autonomy, emotional resilience training, and systemic reform to ensure both educators and students thrive.