First of all, explain the history. When properly explained, people should understand how big of a deal it is. Seperation of mony and state is happening for the very first time in history. For the first time in thousands of years of society. This is how big of a deal it is.
Discussion
Do you mean history of starting a school?
No, history of money and society.
When explained right, bitcoin can be fascinating for teachers from:
Economics - free market
Biology - network effects, rule without rulers
Math - the protocol uses math
PE - Proof of Work aspect
History - Bitcoin is a milestone
Geography - Bitcoins neutality influences politics
IT - Digital software
Did I forgot one?
All the above are great!
English / Language - learning how to articulate thoughts ideas and concepts..