Yes I am from Indonesia, and it's not even a routine extracurricular, it's just a one-time program requested by the school to a community called Bitcoin Indonesia, so they will make a one day event that talk about Bitcoin in a school that invite them. And as far as know, there hasn't been any school that has blockchain specifically for extracurricular, when I wrote 'And I also hope that they not just teach about Bitcoin but also the blockchain technology in general,' I mean in the future so currently I don't think there is any school that teaches blockchain or Bitcoin.
If they are just focused on promoting bitcoin as an investment to get rich then I don't see anything meaningful or commendable. Because investing is completely inappropriate for high school students, they should not be exposed to investing too early, especially highly volatile investments like bitcoin. As I said, it would be bad if they spend time searching for information about bitcoin on the internet and investing in bitcoin, they may fall into scams or lose focus on studying.
Because the foundation of Blockchain is definitely the decentralization, for me that's the main idea, where there is no single entity that control the whole data. And even though Ethereum could be the example of the very successful Blockchain project, it's definitely not a decentralized Blockchain.
As long as they have basic knowledge of blockchain, they will figure out the relevant things themselves, you don't need to worry too much about it and don't need to be too discriminatory or prejudiced. As long as they are fully educated about blockchain, that's a good thing.