Abstract: A presentation session can be identified in which at least one participant of the presentation session is associated with a computing device. A participation artifact can be conveyed to one or more participants. The participation artifact can be configured to solicit a response from a participant and to ensure that each artifact receiving participant is paying attention. The response can result from interactions between the associated participant and the computing device. The interactions can be specific to the participation artifact and can be responsive to a receipt of the participation artifact. A response to the participation artifact can be received from each participant receiving a participation artifact. The received response can be processed to assess an attention level of each participant receiving a participation artifact.

Abstract: When an appropriate context-sensitive ad is created for readers of a content page, it can also serve as a summary of page. In this context, the content indicates anything triggering a user's experience that may be used to decide what ad to show. This could be a particular web site, an application on user's computer, a virtual world, or even a physical location. An embodiment of this invention provides a method to serve the ads previously given on a page or other content to a user, at a time other than when the user is actually consuming that content. This Ads-as-a-summary concept can take various forms. It can also be leveraged at various times, such as a preview.