Ever wanted to take a small digital image and enlarge it - you know what will happen though - it will go all pixely and look bad...
I know there are a couple of plugins for photoshop that resample and clean up the result but they are usually expensive.
I've just come across an elegant solution - SmillaEnlarger - A stand alone image enlarger that does a great job of enlarging low resolution pictures without the JPG and Pixel artifacts. It's open source so it's free to use and pass on to your students. The results are simply amazing - real CSI style "Can you enlarge and enhance that picture?" that you scoff at normally.
This kind of program is really useful for interactive whiteboards when you want to work with sub optimal pictures from a phone or cropped or from the web, as your projector will really accentuate the the "jaggy" low resolution pictures.
