In Korea most of the middle and high schools have uniforms. How is it in your country? I think it is good and bad. I think it is good because it helps students feel not stressed about what to wear. The clothes may show if some students are very rich or poor. This would cause some students to feel embarrassed or outcasted.
However, I think the uniform is also bad because it takes away students' freedom of choice and ability to express oneself. The school also becomes oppressive of the students' individuality as they enforce strict rules such as maximum hair length or specific hair color.
In my opinion, although the uniforms have both good and bad sides, it should be abandoned because students' freedom and expressions are more important. Students can learn to respect differences and be sensitive of social and economic symbols of clothing.