Does appearance affect performance?

Does appearance affect performance?
Why this petition matters
There is no scientific proof relating a students’ academic performance to the way they style their hair.
Schools controlling such a small attribute of a students’ life can be very impactful. Although it may not appear as such a crucial aspect, it makes them feel as though they are being controlled and constrained.
Learners should be allowed to freely express themselves instead of feel constricted, or as if they should conform to a specific mold.
Permitting students to wear their hair the way that they wish, not only enables them to convey themselves, their culture and their personality, but can also help motivate them to face difficult challenges by enhancing their confidence, as well as help them feel more comfortable in such a social environment.