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Explore HOLY TRINITY HIGH SCHOOL (CATHOLIC SEC.) in Gauteng: renowned for quality CAPS education, advanced STEM labs, and active sports and cultural programs with high matric success.;Holy Trinity High School, a Catholic co-ed in Mamelodi East (est. 1972), serves Grades 8–12 under CAPS, achieving a 93% matric pass rate. It features modern science and computer labs, a chapel, sports fields, and faith-based leadership programmes.

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