Program Information The Los Nietos School District (LNSD) is located in West-Whittier. The LNSD serves three elementary schools (Aeolian, Ada S. Nelson, Rancho Santa Gertudes) and one middle school (Los Nietos Middle School). Our current student population that we serve is approximately 1,587 students. The School District values building the community through education and provides engaging educational opportunities and equitable resources for all students to experience excellence in learning every day.