Confidence. We talk about it all the time. We know it matters. And still, educator and activist Brittany Packnett thinks we underestimate it. "Confidence,” she says, “is the necessary spark before everything that follows.”

In this talk, Brittany identifies the three basic elements of this elusive force, which can be especially valuable for people whose role models don’t look like them.

After the talk, Modupe shares one more technique that has propelled her year after year at work. Spiderman makes a brief appearance.