The American High School was founded in 2013 as a school within the larger European School. American High School was founded with the intent of providing Georgian and international students with a pathway to American higher education through rigorous curricula and excellence in standardized test preparation. In 2013, American High School became a candidate for U.S. accreditation with the North Central Association of Colleges and Schools through AdvancED. In the winter of 2015 the American High School hosted an external accreditation review team and was granted full United States accreditation on June 25, 2015. In February of 2020 American High School hosted a reaccreditation team and got accredited for the next 5 years. The American High School is the first school in the region to be accredited under the North Central Association. In 2021 the American High School received accreditation from the National Centre for Educational Quality Enhancement for four years.

The American High School distinguishes itself with its wide curricular offerings and partnerships, as well as its small class sizes, highly qualified faculty and staff, and a caring environment that promotes collaborative work and individual growth. All American High School curricula are aligned to US Common Core and Next Generation standards. American High School boasts 23 College Board approved Advanced Placement (AP) curricula, more than any other school in Tbilisi, Georgia.