Should schools be required to make their students wear uniforms?

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For years some schools have had their pupils wear uniforms, while some did not. Although they can be expensive, could they also be helpful? Some students in schools today are judged based upon the clothes they wear because they aren't name brand, or the background they come from if their parents aren't upper class. But, do you think that uniforms in the schools would have a positive effect or a negative effect 🤔