Secondary outcomes in a phase III trial would be six-month impacts on knowledge, attitudes, skills and intentions
relating to avoiding teenage pregnancy. These short-term impacts are hypothesised to lead to increased intention to avoid
teenage pregnancy. In this feasibility trial, we will collect data from pupils using items developed specifically for use in the
study as well as items from a number of adapted standardised measures to provide broad estimates of effect sizes and the
feasibility and acceptability of the questions. The measures were chosen because the constructs they measure map closely to
the theoretical framework underpinning the intervention. As part of the study, we will develop a measure of intentions to
avoid unplanned pregnancy. We will investigate the association between intentions at baseline and behaviour (abstinence or
avoidance of unprotected sex) at follow-up. While regression analyses would be used in the main trial to model the impact of
intentions on behaviour, the feasibility study is not powered to detect statistical differences and we will present descriptive
statistics relating to the primary outcomes.