Highlands International School

A Catholic bilingual school in southwest Mexico City, part of the international Semper Altius network, serving around 850 students from preschool through high school with a faith-centred American-style curriculum.

Highlands opened in 1995 as an all-girls school and now runs a diamond model: coed in preschool and high school, single-sex through the elementary and middle years. The Semper Altius affiliation aligns it with a Catholic schools network spanning multiple countries, and the school positions itself firmly within the Mexican middle and upper-middle catchment rather than the international expat circuit.

Curriculum is American and bilingual rather than IB or Cambridge, with technology integrated through a 1:1 device model from early grades. Catchment is overwhelmingly Mexican Catholic families who want the formation framework and the bilingual track without the cost of a full international school. Expat families looking for a Catholic option will find it here, but mainstream British or IB schools are a closer fit for transient international postings.

• Highlands International School in Tlalpan, Mexico City sits in the Semper Altius / Regnum Christi network and is described by directory pages as a Catholic, bilingual school running roughly 850 pupils from preschool to high school.
• Parent ratings on Mexican school directories sit in the 4.5-4.6 range from a small review pool. Reviewers cite academic standards, technology integration and pastoral care.
• The school holds Cognia accreditation and Apple Distinguished School status; reviewers and the school itself foreground the technology angle and standardised test results.
• Independent parent forum or Reddit signal is very thin. The only Reddit reference surfaced was a 2020 comment naming the school as one place south of the city that hires foreign English-medium teachers, not a parent review.
• Families weighing Highlands Mexico should treat the public review picture as small and largely directory-driven, and read it in the context of the wider Regnum Christi network's recent governance issues elsewhere.