This brief describes the sampling techniques used in the collection of statistical data for the National Survey of Early Care & Education (NSECE), and provides information regarding the proper use of weighting to obtain valid inferences for statistics of interest such as percentages, means, totals, ratios, and regression coefficients. Two calculation examples are provided in Stata: a calculation of the total number of children enrolled by single age category, and a calculation of percent of programs by single age category.