Wikipedia
Efterskole
The Efterskole (literally "afterschool") is a unique Danish independent residential school for young people between the age of 14 to 18 years. On an efterskole, students can choose to spend one, two or three years to finish their primary education and currently some 28,500 students attend one of approximately 260 schools throughout Denmark. The schools are open to students from abroad.
An efterskole usually offers a variety of "study lines", focussing on specific sports or performances, such as soccer, music, water sports, golf, cooking, dancing, etc.. Those particular lines offers practice and training on a professional level.