Saint Jeanne de Lestonnac School is a charter member of the California Junior Scholarship Federation (CJSF), an affiliated high school chapter of CSF. All students in grades seven and eight, throughout the state of California, are eligible for membership based on the trimester report cards, beginning with the end of the first trimester of seventh grade. The organization's motto is "Scholarship for Service", and “active” members of CJSF are expected to attend regular meetings, pay their dues, and to participate in a variety of service projects directed by the faculty advisor and the administration.
Students must apply for membership by the deadline designated by the advisor. Every application must be accompanied by the most recent report card to verify eligibility. No exceptions are made. Students receive three points for every solid subject "A", and one point for every solid subject "B". A minimum of sixteen points is required in order to be eligible. There are eight solid subjects that are considered for membership: religion, literature, mathematics, social studies, spelling, English, Spanish, and science. A student is disqualified for membership for any grade lower than a C- in an academic subject, and lower than a B in conduct (per the state’s requirement), for the trimester grade. Students who qualify for CJSF and NJHS in June of the previous year are recognized at the Fall Recognition Assembly.
Each year, the junior high faculty members nominate one or two eighth-grade students to represent Saint Jeanne de Lestonnac School in the regional Marian Huhn Service Award Competition at the annual CSF/CJSF Conference. All CJSF members are expected to attend this local, annual conference per the direction of the advisor(s). The nominees are judged on academic performance, participation in school activities, and community service. Saint Jeanne de Lestonnac School representatives have received this very distinguished award numerous times over the years. This regional award was established after the passing of one of California’s most respected registrars, Marian Huhn, who was the first lay teacher of Saint Jeanne de Lestonnac School, Tustin, and the first advisor for the school’s CJSF chapter.