The 'Big Sister' programme at St Paul's is where each new girl is allocated a year 12 or 13 'Big Sister' who becomes their go-to person for the year. They have coffee dates, write notes to each other and become friends to help to facilitate the transition into St Paul's. 

Sophie Stocker, House Prefect in charge of the Big Sister programme, led the "challenge video" concept and made it happen. The little sisters responded by accepting their challenge and sent make their own messages.