The campaign brings together thousands of children across the UK to speak up for the right to education, and remind world leaders of their promise that all children should get the chance to go to school. It is overseen by the Global Campaign for Education, an organisation with members in over 100 countries, and aims to assist the 123 million children, who are out of school around the world.
4,242 schools in the UK are taking part in 2016 and the theme this year is to provide Education in Emergencies.
Commenting on the visit, Sarah said:
"I was delighted to listen to the moving songs and poems the girls prepared to communicate their understating and compassion for children refugees who are not in school. Also, I will be displaying their beautiful artwork on my office wall. I was pleased to listen to the girls lobby me and answer questions posed by members of the School Council.
"I am proud that the UK has helped 11 million children get a decent education in the last five years, training 190,000 teachers, building classrooms and ensuring the poorest girls and boys have school bursaries and textbooks. We have committed to help 11 million girls and boys gain a decent education by 2020."