This paper describes the effectiveness of a three-step indoor air quality (IAQ) program implemented by 156 schools in the states of Washington and Idaho during the 2000-2001 school year. An experienced IAQ/building science specialist conducted walk-through assessments at each school. These assessments documented deficiencies and served as an on-site training opportunity for the schools' facilities and administration staffs. Schools used the assessment findings, along with guidance from the specialist, to adopt indoor air quality practices and procedures from a "menu" of options. At least 22 options were selected by all schools, with most schools adopting more, up to as many as 58. The findings from the assessments and the specific options selected were compiled into a database to be used by school officials and agencies. A survey of schools confirmed the program's usefulness. (EV)