Differences were identified in student and teacher perceptions of how the educational intervention had been implemented and how its uptake had been influenced by context-dependent factors : ( i ) the intervention was implemented in different ways to suit different educational contexts and this influenced how students and teachers responded to it ; ( ii ) the ways students and teachers interacted with , and behaved around , the intervention influenced its uptake ; ( iii ) the way the intervention was perceived by students and teachers influenced its uptake ; and ( iv ) the medium and design of the intervention had a directing influence on its uptake .