Because of war and civil war on the territory of Bosnia and Herzegovina, education in ethnically divided country has become fragmented. Because of postwar divisions thirteen different ministries of education or similar bodies are responsible for education, resulting in inefficiency and low quality. To overcome differences, a committee of experts has prepared an outcome-based common core curriculum for science education from preschool to the upper secondary school level. Since the working group comprised representatives from all major entities, ethnic and religious groups, and school levels, as well as teachers from Biology, Chemistry, Geography and Physics, a positive outcome for the consolidation of science education can be expected.