From the summary:
The nation’s 97,000 public school buildings comprise an estimated 6.6 billion square feet of space on over 1 million acres of land. And while states and local communities invested over $500 billion in K-12 school building improvements from 1995 to 2004, considerable additional investments are needed to ensure that the nation’s public schools are healthy, safe, environmentally sound, and built and maintained to support a high-quality education.
Today, many of the nation’s schools face the combined challenges of deteriorating conditions, out-of date design, and changing utilization pressures (including intense overcrowding in some communities and rapidly declining enrollments in others). These combined deficiencies impair the quality of teaching and learning and contribute to health and safety problems for staff and students. Building design and facility conditions have also been associated with teacher motivation and student achievement.