Paint Splatter Template
A simple template, with space in the green for the title of the lesson (or of each individual page). The blue space to the left can be used to create navigation. There's plenty of white space for the lesson content.
The blank version, as seen above. Click the picture to download the background as a PowerPoint, or click here to get it as an image.
The same template, with icons preplaced. You won't be able to change the icons, if you select this option. All icons were taken from Free Icons Web, where there are plenty of alternatives.
Again, click the image for the PowerPoint version, or click here to get it as an image.
Image featuring the icons and an explanation for what each one does. Makes a good opening slide. This is already on the PowerPoint above (delete it if you wish), but you can click here to get it as an image file if you are working with a different program.