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Confidence. We talk about it all the time. We know it matters. And still, educator and activist Brittany Packnett thinks we underestimate it. "Confidence,\u201d she says, \u201cis the necessary spark before everything that follows.\u201d

In this talk, Brittany identifies the three basic elements of this elusive force, which can be especially valuable for people whose role models don\u2019t 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.