Students having the option to take vocational classes is not what I would call "immersive".
Germany, Finland and other European countries tend provide a more vocationally focused approach for High School students wanting to acquire professional skills. Germany for instance has mobilized industry to provide apprenticeships and the vocational curriculum is designed in cooperation with the business community.
Finland has gone even further. Students are required to complete the first 9 years of general studies. Starting in the 10th grade (about 16 years of age) students can opt for what is called an "upper secondary vocational qualification".
Vocational schools in Finland prepare an individual curriculum for each student after review of the student's needs. The programs focus on vocational studies and incorporate work-based learning and apprenticeships. The primary focus of each program is to provide students with the competence necessary to work in their chosen field.
To complete an upper secondary vocational qualification students need to complete 180 competence points (one year of study is typically 60 competence points). Academic subjects are inserted into the "common units" but are a minority of each program's composition. Here is a breakdown of an upper secondary vocational qualification:
180 Competence points.
"The scope of common units in vocational upper secondary qualifications is 35 competence points out of 180."
"Vocational units
- Basic and field specific study unit(s) (compulsory)
- Specialised study units (partly optional)
- Other optional units (decided by VET provider)
- Work-based learning is included"
"Common units
- Communication and interaction competence
- Mathematics and science competence
- Citizenship and working life competence"
It is a program of study for High School students which is focused on vocational education and what I would call much more immersive.
The mission of vocational education and training in Finland is to provide high-quality and relevant education and training for all learners, be they young school leavers or adults. Continuous efforts are made to raise national standards of vocational competence, to foster the skills required in...
www.oph.fi
Sorry but the details are in a pdf - I couldn't find an html version.