Describes the background and design of the SNDA-III study. Data were collected from 130 public school districts that offer federally subsidized school meals, 398 schools within these districts, and 2,314 students in grades 1 through 12 in these schools.

Describes the background and design of the SNDA-III study. Data were collected from 130 public school districts that offer federally subsidized school meals, 398 schools within these districts, and 2,314 students in grades 1 through 12 in these schools.