Successful schools are likely to have better working conditions and facilities …

„Successful schools are likely to have better working conditions and facilities, such that the physical environment is structurally sturdy, big enough, well-maintained, and comfortable (e.g., temperature and lighting).“

IEA (Hrsg.), „TIMSS and PIRLS 2011: Relationships among reading, mathematics, and science achievement at the fourth grade“ (2013), S. 114