The children in year 2 represented our school beautifully when we had a visit from a Teacher Research Group (TRG). The aim of a TRG is to work collaboratively with other schools to improve their practice through a mastery approach to teaching mathematics. In this lesson the children were learning to use a part-part-whole model to represent addition and subtraction. They used known facts to help solve equations with bigger numbers. Our known fact for this lesson was 4+3=7