European high schools differ from American high schools in several ways, including:

Age of students: In many European countries, high school starts at a younger age and covers a broader range of subjects than in the US.

Curriculum: European high schools generally have a more comprehensive curriculum, with a stronger emphasis on languages and humanities, and less on elective courses.

Class structure: European high schools typically have smaller class sizes and more individualized attention for students.

Length of school day: European high schools generally have shorter school days, but students are expected to study on their own time.

Approach to assessment: European high schools often place more emphasis on exams and written assignments, and less on regular testing and homework, as a measure of student progress.

Focus on vocational education: European high schools offer more opportunities for students to pursue vocational or trade-based education, as an alternative to university-bound academic studies.