I know that you're goal is to share your knowledge about cryptocurrency to the next generation since we all know that the bitcoin or cryptocurrency is the future of the economy (I hope)
But there are things you need to consider first in order to teach teens about cryptocurrencies.

Ask them if they're interested about the cryptocurrency and how are they going to earn through it. We all know that teenagers are most probably focusing on studies, social life or love life and you can't push them to learn all about the cryptos because it's the future maybe you can just introduce to them what really bitcoin or crypto is or background regarding it and if they're interested maybe you can teach them from very basic such as the introduction of bitcoin/cryptos > Making wallet > Investment or how to earn as simple as that.