Find out more from Blue Peter's Radzi Chinyanganya about taking part in this ground-breaking project.
Using the traditional school class photograph, the portrait will capture tens of thousands of London school pupils aged 7-8 in a milestone year of their development.
An exhibition featuring tens of thousands of Year 3 pupils
Between November 2019 and May 2020, the Duveen Galleries at Tate Britain will be taken over by a vast exhibition of class photographs, free for all to visit.
Free sessions will be taking place in primary schools between October 2018 and July 2019
Every participating school will be invited to visit the exhibition and see themselves at the heart of the nation’s collection of British art.
Be part of this major artwork, free programme and learning resources, along with teacher development days and the opportunity for your school to join an open online lesson.