The teaching and study of design history within art and design programs in Britain are one of the results of the National Advisory Council on Art Education in the 1960s. Among its aims was making art and design education a legitimate academic activity, to which ends a historical perspective was introduced. This necessitated the employment or 'buying in' of specialists from art history disciplines, leading to a particular style of delivery: "Art historians taught in the only way that art historians knew how to teach; they switched off the lights, turned on the slide projector, showed slides of art and design objects, discussed and evaluated them and asked (art and design) students to write essays – according to the scholarly conventions of academia".