Echo360 lets you upload presentations to your library or a class, then to edit the presentation directly in Echo360 by adding or deleting slides/pages.
There are four ways to add slides to a presentation through the Echo360 interface:
You can also create a blank slide in the presentation to act as a spacer or "pause" location to display while students do something else.
ALTERNATELY, you can download and install the Microsoft Office PowerPoint Ribbon add-on provided by Echo360. This add-on allows you to create and edit a slide deck through PowerPoint, including adding activity slides, then publish it to a class.