Good indoor environmental quality (IEQ) is an important component for improving the productivity of students, teachers and support staff. It is crucial for a sense of health and well-being. The overall IEQ has a significant influence on student attendance and performance. Studies have shown that poor indoor air quality results in more illness, absenteeism and asthma attacks. Indoor carpeting has been cited as presenting problems for IEQ--but further research indicates the way the carpet is maintained is more of a factor than its presence or absence. Various organizations have made recommendations to help schools select, install and maintain carpeting. The Carpet and Rug Institute recommends purchasing carpeting that complies with its Green Label Plus program. The Institute of Inspection, Cleaning and Restoration Certification (IICRC) has published a "Standard and Reference Guide for Professional Carpet Cleaning (S100)." This standard describes the procedures, methods and systems to be followed when performing professional commercial and residential textile floor covering (carpet and rugs) maintenance and cleaning. Providing well-maintained carpet contributes to improved IEQ.