Schools can choose to teach about gambling in their personal, social, health and economic (PSHE) lessons. The non-statutory PSHE programme of study, published by the PSHE Association, includes teaching about gambling (including online gambling), and its psychological and financial impact. The programme of study is available online at: https://www.pshe-association.org.uk/
The government expects all schools to teach PSHE and made this expectation clear in the introduction to the national curriculum. It is for schools to tailor their personal, social, health and economic education (PSHE) programme to reflect the needs of their pupils.