low cost
Without going through the school, any social worker or student at school can take the self-study exam. The cost of the exam alone is tens of yuan.
Five national qualifications
There are five kinds of national academic qualifications certification: unified recruitment, self-examination, adult education, TV university and online education. In terms of gold content, it is unified recruitment > self-examination > adult education, TV university and network education.
Tuition fees vary.
As for whether the school will be expensive, you can ask. But now some schools are not operating normally, so it will be more expensive to pack things like that. But it's much better than taking the exam yourself.
This is more difficult.
Self-taught exams are very difficult if you take them yourself. Especially if you didn't go to college. Among them, advanced mathematics, English and some specialized courses are the most sad.