Abstract: A method of selecting content to form a content presentation, the presentation comprising an ordered sequence of selected amounts of content, there being a plurality of items of content available for the presentation, the method comprising: (a) for each of the items of content, determining an associated weight-value based, at least in part, on one or more parameters for the presentation; (b) performing a weighted selection of one of the items of content, the selection being weighted in accordance with the weight-values associated with the items of content; (c) selecting at least a part of the content of the selected item of content to be one of the amounts of content in the ordered sequence of selected amounts of content; and (d) repeating steps (a), (b) and (c) until the presentation is complete.