Colors can greatly contribute to attention span and information retention. Though this post refers to colors in infographics, we might use the same ideas even for ppt design.
They became quite popular a couple of years ago due to the fact that there are many easy to use and free tools to make them. You will use infographics (information+graphical presentation) to present complex information and data quickly and clearly. You can use infographics for teaching or your students can do them as part of their assignment. To get you started, let’s review the diigo collection on inforgraphics.