Rephrase the following:

General norms were derived from U.S. samples that were selected in accordance with reported 2013 U.S. Census Bureau statistics. Within each age band, the normative sample was stratified to align with parent education, race/ethnicity, and the four geographic regions of the United States. In addition, equal numbers of males and females were included in each age band. The teacher, parent, and self-report samples included 1,700; 1,800; and 900 participants, respectively. Each age band was represented by an appreciable 300 participants for each of the three forms, except for the teacher form at ages 2-3 for which 200 participants provided data.