1. Natural science education: Natural science education is usually a part of academic education, but in the dual education system in Germany, natural science education is not a separate subject field.

2. Social science education: In academic education in Germany, social science education belongs to the field of humanities and social sciences, but in the dual education system in Germany, social science education is not a part of vocational education.

3. Art and music education: Although a few vocational schools offer art and music education in the dual education system in Germany, it is usually not regarded as the core part of the dual education system.