A day of action will be held next month for shot Pakistani schoolgirl Malala Yousafzai and the 32 million girls worldwide who are not in education.
Saturday November 10 will mark exactly one month since the 15-year-old was shot in the head by a Taliban gunman as she travelled home from school with two classmates in north-west Pakistan.
It has been declared “Malala and the 32 million girls day” and aims to boost international support for girls’ education.
The latest Unesco figures show that 61 million children are not in school, and 32 million of them are girls.
Mr Brown, who is a UN special envoy for global education, will present petitions to President Zardari and UN Secretary-General Ban Ki-Moon showing support for Malala and calling on the Pakistani government to draw up an education plan.
Nearly one million people have already signed the petitions.
Mr Brown said: “The world – and young people in particular – has shown its revulsion at both the actions of the Taliban and the scandal that leaves 32 million girls globally out of school.
“The time is now to take action to deliver on our promise of universal education. I call on all global citizens to make their voice heard from now until the day of my visit to Pakistan on November 10th.”
Malala was admitted to the Queen Elizabeth Hospital in Birmingham a week ago after being injured in Pakistan, and has since received thousands of goodwill messages