Attention on children and young people's (CYP) wellbeing has increased internationally over the past two decades, particularly in the context of education. This small scale, preliminary study was conducted across four state-funded schools in England (two primary; two secondary) amidst a time of policy change that saw the introduction of Mental Wellbeing Support Teams in schools, and the mandating of statutory Health Education curricula. The study investigated whether psycho-informed lessons could be developed aligned to curriculum guidelines, and how pupils would engage with this learning content. Drawing on Positive Education (PE) theory, and Self-Determination theory (SDT) the researchers worked collaboratively to co-develop and deliver lessons to CYP (aged 9-11 years, and 14-15 years). This paper describes the theoretical underpinnings of the lessons, learning activities used, and critically reflects on pupils' engagement. Implications for practice are considered and recommendations made regarding possible future teaching of mental wellbeing in England.