As principal for a day, I would make three changes to enhance happiness, safety, and greenery.

First, I would organize a tree plantation drive where every student plants and adopts a tree, creating more green spaces and shaded areas in the school. This would make the campus cooler and more beautiful while teaching students responsibility toward nature.

Second, I would implement a proper waste segregation system with clearly marked color-coded bins throughout the school and start a composting program for wet waste. This would improve cleanliness and teach students about environmental responsibility.

Third, I would establish student safety committees that monitor traffic safety near the school gate, conduct regular fire drills, and ensure all safety equipment is accessible. These committees would create awareness and make students active participants in maintaining a safe school environment.

These changes would create a happier, safer, and greener school for everyone.