The study CCSA ("Cross-Cutting Skills Assessment In Secondary School Practice") is a research project at the University of Bern. The primary objective of CCSA is to contribute to educational research in Switzerland and Ukraine, with a focus on reforming education goals and teaching methods at the secondary school level. CCSA's first aim is to investigate the practice of cross-cutting skills assessment in secondary schools in Switzerland and Ukraine (on the ISCED level 2) to develop a better understanding of the success factors and teachers’ needs in cross-cutting skills assessment activities. For this purpose, the CCSA field trial is designed to answer the following questions: How do teachers in Switzerland and Ukraine perceive the importance of specific cross-cutting skills for their students' future life in society? Which cross-cutting skills are currently fostered by teachers in the classroom in the countries surveyed? What strategies do teachers in Switzerland and Ukraine use for assessing students’ cross-cutting skills, and how do they document these assessments? What are the needs of teachers in Switzerland and Ukraine regarding the promotion and assessment of cross-cutting skills? What school- and country-specific differences and similarities can be recognized concerning future requirements, current teaching practices, and the needs of teachers? The study of the project's issues from the perspective of schoolteachers and experts (scientists and didactics specialists) enables a comprehensive analysis within the respective educational environments. The summarization of existing experience and pedagogical knowledge can be beneficial to Ukrainian and Swiss teachers, as well as students in both countries studying at pedagogical institutions. CCSA, therefore, aims to provide a data source for researchers and educational policymakers to support the development of practical materials for teachers based on the analysis of current practices for assessing cross-cutting skills in the learning process of secondary school students.