And so she kept those things in her desk, and years later, after she retired, I watched some of those same kids come through and say to her, "You know, Ms. Walker, you made a difference in my life.
They all seemed to get a really big laugh out of that comment, but it wasn't until a few years later that I fully understood what they thought was so funny.
Just two years later, when the codec problem was solved by Adobe Flash and when broadband penetration crossed 50 percent in America, YouTube was perfectly timed.
The founders of this study would never in their wildest dreams have imagined that I would be standing here today, 75 years later, telling you that the study still continues.