Slidecasting is an alternative to screencasting that involves creating a slideshow presentation from screen shots, recording an audio narration, and uploading the slideshow to Slideshare while linking to the audio file to synchronize the two. The document provides instructions for creating a slidecast, including taking screen shots, using presentation tools like PowerPoint and OpenOffice Impress to create the slideshow, recording audio with Audacity or PodcastPeople.com, uploading the slideshow to Slideshare, and linking the audio file to synchronize the slideshow and audio.