What schools allow children to wear backpacks?

Most schools, from preschool to high school, allow children to wear backpacks. It's extremely rare to find a school that completely prohibits backpacks. However, some schools may have specific rules regarding backpack size, contents, or placement (e.g., no oversized backpacks, no weapons allowed, backpacks must be kept on the floor during class). To know for sure, you'd need to contact the specific school you are interested in.