When talking about IDL and its development, it’s helpful to remind ourselves what disciplines and school subjects are and why they are important in IDL. A discipline is a branch of learning or domain of knowledge that is characterised by distinct objects, concepts, principles, theories, skills, tools and applications. Established disciplines in schools, colleges, higher education and research institutions alike comprise groupings of ‘like-minded’ people with a shared language. Their boundaries are not always well defined. Disciplines give