The Global Impact Challenge supports British non-profits using tech to tackle the world's toughest problems. The 10 finalists are in, help decide who wins.Project:War Child will use crowdsourced digital mapping to reduce sexual violence and support child protection in the Democratic Republic of Congo (DRC). Helplines and SMS technology will enable War Child to advocate for child protection, analyse trends, and maximise support for affected children.Impact:An average of two children are raped or abused every hour in Goma, DRC. This statistic is likely underreported due to stigma and fear. War Child plans to use anonymous crowdsourced mapping to show the true impact of rape against children in the DRC. Using information collected through SMS and helplines, War Child will respond quickly to kids who are most in need. Over 18 months, this project will provide counseling for 3,000 young people and, through mapping, prevent the rape of an estimated 6,000 children annually. War Child's vision is a world where children's lives are no longer torn apart by war.Get involved:Cast your vote by the 31st May on https://globalimpactchallenge.withgoogle.com/ for the £500,000 fan favourite Global Impact Award.On 3rd June, a panel of judges will unveil the public vote, and select three additional non-profits as winners of the Global Impact Challenge.