I understand that this is a touchy subject, especially on HN, but come on: "Avoid editing what you want to say in your head, and try not to worry about being wrong." This is straight from their Leadership Tips for Girls pdf. They are encouraging girls to just say whatever comes to mind. What's next - calling everyone who disagrees "sexist"?
That is highly disingenuous. The advice they gave, in context, was: 1.Speak Up _ in Class _ Raise your hand, even when you’re not sure about the answer. Avoid editing what you want to say in your head, and try not to worry about being wrong. Speaking up isn’t about having the perfect answer. It gives you the experience of thinking on your feet, debating with others, and wrestling with an idea—all crucial skills that…
Really the only tip that matters is tip #9, which basically says people will give you shit but do it anyway. This is something all kids need to learn.