US first lady Michelle Obama (R) poses with Britain's Prime Minister David Cameron and his wife Samantha at Number 10 Downing Street in London June 16, 2015. [Photo/Agencies]

The first lady launched the "Let Girls Learn" initiative to expand access of education for adolescent girls. She also met Prince Harry on Tuesday to discuss support measures for veterans and their families.

"We're training teachers, building classrooms and providing the poorest girls and boys with scholarships," Greening said in a statement.

Apart from providing immediate education opportunities, Britain and the United States will partner with international researchers to understand the obstacles that girls face in getting an education, British Department for International Development (DFID) announced.

Researchers will follow girls in poor countries from their early days at school to learn more about their challenges in receiving education.

Government departments in Britain and the United States will collaborate with researchers from Cambridge University and Georgetown University in the project, according to DFID.