You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Private_school

Context:
Ergänzungsschulen are secondary or post-secondary (non-tertiary) schools, which are run by private individuals, private organizations or rarely, religious groups and offer a type of education which is not available at public schools. Most of these schools are vocational schools. However, these vocational schools are not part of the German dual education system. Ergänzungsschulen have the freedom to operate outside of government regulation and are funded in whole by charging their students tuition fees.

Question:
How are ergänzungsschulen funded?

tuition