The document discusses how shifting time and space through technologies have impacted education and library instruction. Time shifting allows recording and viewing content at a convenient time, while space shifting moves content to different locations and formats for easier access. This enables 24/7 access to library resources, live chat across distances, and asynchronous discussions. For libraries, it means users expect some control over learning and libraries can provide instruction through screencasts, anticipate questions, and offer mobile content. Screencasts in particular allow reusable, point-of-need instruction that reaches more users with less repetition of content.