Sorry, I sort of asked this question in a thread here, but I'm interested enough in answers that I'm going to ask it again.
Does it seem like a good idea for the long-term future of humanity for me to become a math teacher or producer of educational math software? Will having a generation of better math and science people be good or bad for humanity on net?
If I included a bit about existential risks in my lecturing/math software would that cause people to take them more seriously or less seriously?
In the unlikely event that you end up significantly improving the amount of mathematical expertise in humanity, you should be very pleased with yourself.
It's definitely not a bad cause. You should do it if it's something that would engage and satisfy you. If you turn out not to be suited for it, no harm done; find something else you're good at.
Here's our place to discuss Less Wrong topics that have not appeared in recent posts. Have fun building smaller brains inside of your brains (or not, as you please).