How do I turn off/disable my trackpad on a MacBook Air? I am on a mission to become proficient with keyboard shortcuts, and I keep cheating by accident and using my trackpad. I want to be rigorous in my attempt to learn, so how do you toggle the trackpad on and off?

I found information on how to turn it off if you use a mouse, but that defeats the purpose of what I am trying to do. 

In the spirit of learning keyboard shortcuts, if anyone knows how to set a keyboard shortcut to toggle the trackpad, that would be optimal.
To turn off the track pad you’ll need to attach a mouse or wireless trackpad but you don’t need to use it. 

To turn off the trackpad when a mouse is connected:


From the  Apple menu go to System Preferences
Click Accessibility 
Select Mouse and Trackpad on the left 
Select “Ignore built-in trackpad when mouse or wireless trackpad is present”