Every school contains shoe lockers at its entrance because students are required to take off the shoes they wear outdoors and put their uwabaki when arriving. Uwabaki are kind of white slippers meant only to be used in the school's indoors.
Students are allowed to stay in their classroom during breaks
Only a small amount of schools allow students to wear tights during winter
Many elementary students travel by themselves on their way to school and when returning home
Shoe lockers in japanese are called "getabako" and are located in the school's entrance hall so that students can immediately wear their uwabaki when arriving. This prevents them from tracking outside dirt and helps keep the place clean.