All schools are required to participate in an archdiocese-wide standardized testing program.  Standardized test results are only one indicator of the students' overall academic achievement. Teachers use standardized test results to identify students' relative academic strengths and weaknesses, design curriculum, and plan for instruction, and principals use the results to evaluate curriculum in order to set instructional priorities and plan appropriate professional development.

Catholic schools in the Archdiocese of Los Angeles participate in STAR Assessments through Renaissance Learning. These assessments will provide principals, teachers and parents a more comprehensive picture of student growth and performance and will allow Catholic schools to better meet the needs of all learners in the classroom. STAR Assessments are administered three times a year to students in grades TK through eight.  Students in grades TK through eight are assessed in reading.  Additionally, students in grades one through eight are assessed in math.

The National Catholic Educational Association Assessment of Children/Youth Religious Education (NCEA ACRE) is administered annually to students in fifth grade (Level 1) and eighth grade (Level 2) in archdiocesan schools. NCEA ACRE is a tool for assessing the effectiveness of catechetical programs in Catholic schools and parish-based religious education programs. NCEA ACRE includes questions about faith knowledge and religious beliefs, attitudes, practices, and perceptions. It provides information about a catechetical program's strengths and areas that may need additional attention or improvement.