Summary:
San Dieguito Union High includes 10 schools: five middle schools serving grades 7–8 and five high schools serving grades 9–12, including a continuation school. In 2025–26, both groups averaged well above California in all three subjects: high schools averaged 78% in ELA, 63% in math and 60% in science; middle schools averaged 79%, 73% and 65%, respectively, compared with state rates of 49%, 38% and 36%. The clearest overall finding is that results are strong compared with the state, but high-school scores vary widely—by 38 percentage points in science, from 80% at Canyon Crest Academy to 42% at Sunset High (Continuation).
Canyon Crest Academy and Pacific Trails Middle led their groups in all three subjects. Canyon Crest’s results were 17 points higher in ELA, 28 in math and 25 in science than the average for the other high schools. Pacific Trails led the other middle schools by 9 points in ELA, 11 in math and 14 in science. At the other end, Oak Crest Middle was lowest among middle schools, scoring 5 points below the other middle schools’ average in ELA, 20 below in math and 15 below in science—yet it still exceeded state rates in every subject. San Dieguito High School Academy had the lowest high-school math result, at 50%.
Recent gains were strongest in high-school math and science: the high-school average rose 11 and 7 points, while middle-school averages rose about 1 point in each. La Costa Canyon High improved in all subjects, and its SchoolDigger rank rose from 369th in 2023–24 to 126th in 2025–26; Sunset also made large gains, including 37 points in math. SchoolDigger ranked Canyon Crest 21st among California high schools in 2025–26. For context, 2024–25 figures show free/reduced lunch eligible at 11% of Canyon Crest students and 33% at Sunset; California is marked as providing free meals to all students statewide. Sunset also had a 12.4 student-teacher ratio and 81% chronic absenteeism, compared with Canyon Crest’s 25.7 ratio, underscoring that smaller enrollment or a lower ratio does not guarantee higher test scores.
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