This report provides national data for 903 U.S. public elementary and secondary schools on the condition of public schools in 1999 and the costs to bring them into good condition. Additionally provided are school plans for repairs, renovations, and replacements; data on the age of public schools; and overcrowding and practices used to address overcrowding. Among the findings are: about a quarter of the schools reported at least one type of onsite building in less than adequate condition; half reported at least one building feature in less than adequate condition; and about 4 out of 10 reported at least one unsatisfactory environmental condition. Data also suggest that the oldest schools are most in need of attention but that many of these schools do not have plans for improvement. About three-quarters of public schools do not have problems with overcrowding, but nearly 10 percent have enrollments that are more than 25 percent greater than the capacity of their permanent buildings. Appendices provide survey methodology, tables of standard errors, and the survey questionnaire. (Contains 34 references.) (GR)