The most recent data available were used. Data Cautions and Anomalies Schools, districts, other agencies, and testing organizations report the data used in comput ing rates for the High School Performance Report. Erroneous data will produce erroneous numbers for the quality indicators. In some instances, the data for a quality indicator are incomplete or simply unavailable. Numbers based on erroneous data may result in extremely large increases or decreases in the two-year growth measure.
Numbers based on small numbers of students also tend to be unstable.
This type of extreme fluctuation should be treated with caution. In such instances, it is wise to avoid generalizations about gains or losses in performance. District, county, and state numbers reflect not only students enrolled in comprehensive high schools but also any students enrolled in continuation high schools or alternative schools.