This paper explores the rationales underpinning the introduction of Computer Science (CS) into school curricula and examines the ways in which educational systems have responded to these growing calls. In outlining the possible ways that educational systems can respond to this demand, the paper makes use of a conceptual framework through which the various possibilities for the provision of CS in school curricula can be categorised. The paper analyses and discusses possible modes of provision identifying the benefits and drawbacks of different approaches. Through this development, the paper aims to raise wider questions about the long-term and draws particular attention to the need for greater consideration of provision at lower secondary level.