The JobRaising Challenge, our effort to raise money, increase awareness and support nonprofits working to create jobs, yielded more than $1.5 million in donations -- most of them under $100. Now, knowing just how much impact we can have, and how many organizations are eager to make a difference, we are again asking how we can raise money and awareness, this time to tap into the potential of women-focused nonprofits. So I'm delighted to announce The RaiseForWomen Challenge, an initiative to help women-focused nonprofits gain resources and recognition, in partnership with The Skoll Foundation, Crowdrise, and Sheryl WuDunn and Nick Kristof's Half the Sky Movement. The initiative coincides with a women's conference I'm co-hosting with Mika Brzezinski on June 6, on the theme of "Redefining Success: The Third Metric." To sign up to participate in the Challenge and invest in women who are changing the world, click here.