That link has your si in it. Your si is a tracking code Google uses to determine who clicked on links you shared. They want to know who your friends are for their social data models.
Okay so NASA lost a $327 million Mars probe because said was transmitting trajectory corrections in the SI Units of Newton-Seconds, but the home base software was interpreting and calculating it as Pound Seconds.
Remembering that there was endless amounts of scientific equipment aboard that took years to make, and the whole enchilada took 10 months traveling through space before it could even crash.
If your goal is to teach new material, you teach that material specifically. You dont mix other things into it because 1) it makes it harder for them to learn that new material and 2) it makes it harder for you to figure out what they dont understand.