Why don't some school allow turtlenecks?

Some schools may prohibit turtlenecks due to dress codes aimed at promoting a certain level of formality or uniformity in student attire. Turtlenecks can be seen as informal or casual, which may not align with the school's desired image. Additionally, concerns about distractions or interpretations of appropriateness might lead to restrictions on certain clothing styles. Ultimately, these decisions are often made to maintain a focused learning environment.