This report examines the relationship between socioeconomic status, as defined by a free-and-reduced lunch proxy variable, and student growth percentiles by elementary, middle, and high school grade levels for math, reading, and writing. Comparisons were made between median growth percentiles for each educational level by free and reduced lunch status (i.e. using Mann-Whitney "U"-tests). As a final measure of relationship, point-biserial correlations were calculated between student growth percentiles and free-reduced lunch eligibility status. The results of this descriptive analysis reveal consistent differences in median and adequate growth percentiles between free/reduced and not free/reduced lunch eligible students for all content areas and grade levels. The median growth percentiles tend to be lower for free lunch students compared to non-eligible students. Similarly, the adequate growth percentiles tend to be greater for free and reduced lunch students. This finding indicates that not only are free-reduced students displaying lower growth percentiles, but they are also requiring substantially higher growth rates to maintain or reach proficiency within three years or by 10th grade. Future reports will examine other demographic factors that may be related to observed student growth percentiles.