Skills are what you use them for; I have talents that never get used except for me, and then someone else finds out, and it goes from there.
I showed people how to solder 0201's this week; I can't really see them without a stereo microscope, lol.
I really hate lead free solder, tho.
If I'm calculating aerodynamics, it's for me, and a test case the software I have doesn't cover, lol.
I showed a nephew how math in the classroom connects to the real world, and got a note sent home to not make the other kids feel bad.
This is what I showed him:
Easy Gearhead Calculus:
Position is where you are. {x,y}
You want to go to the end of the dragstrip. X+N(mi),Y
How fast you went is T(seconds)=X+N(mi), Y
Σ(X+N)/T is how fast you went average across the distance. (10 seconds is 40mph, lol. That's if you were going an even speed over 1/4 mi.)
Velocity is the first derivative of position.
Since a real drag race doesn't work that way, you get to Acceleration.
Acceleration is the second derivative of position... and it's a function of HP/RPM/W (Weight). And you have other stuff too:
HP/RPM, Gearing, Tires, slipping, wheelbounce, and all with respect to the mass of the vehicle; all the gains and losses are their own functions.
So just simple math can take you some great places; these days you can model the tire flex, with the right programs.
My uncle has acceleration data every 0.01 second, and that's a great way to sort out problems with traction, etc.