International curricula According to the Basic Schools and Upper Secondary Schools Act, it is possible to conduct studies in Estonia by following the curriculum formulated under the aegis of either the International Baccalaureate Organization (IBO) or the Statute of the European Schools. In Estonia, the opportunity to study according to the IBO curricula is provided by the Tallinn English College, Miina Härma Upper Secondary School, Audentes private school and the International School of Estonia. The Statute of the European Schools serves as the charter for the operations of the Tallinn European School.