I'm pretty sure I'll still be working from 60 to 70

Because I haven't gathered enough pension yet, lol.  And I think I should work till close to death because not working is a waste of time to me. I don't get to live forever so everyday is precious. Unless I can't stand up in front of my students anymore, I'd still want to be with them daily, five days a week. Teaching and caring for kids are the core of my life. Seeing them learing and growing everyday brings purpose and joy to my life. Let death do us apart. 

Besides, I have no other hobby that can keeps me going but work.