Air pollution is air pollution, indoors or out. Good indoor air quality (IAQ) contributes to a favorable learning environment for students, protects health, and supports the productivity of school personnel. In schools in poor repair, leaky roofs and crumbling walls have caused additional indoor air quality problems, including contamination with lead and asbestos, dust, or radon. United States Environmental Protection Agency studies of human exposure to air pollutants indicate that indoor pollution levels may be 2-5 times, and sometimes 100 times, higher than outdoor levels. Most people spend 90% of their time indoors. It is easy to understand why school decisions to cut spending on cleaning and repair ("deferred maintenance") are penny-wise and pound-foolish: resulting air pollution will harm occupants and multiply the cost to repair buildings later. This paper shows some typical signs/symptoms of IAQ problems and what schools should be doing. It also offers tips on when parents should suspect a school has an IAQ problem and what they should do if schools ignore IAQ problems. A list of resources is included.