INKSCAPE is an Open Source Scalable Vector Graphics Editor. This is what they say on their website.
Inkscape is an open source drawing tool with capabilities similar to Illustrator, Freehand, and CorelDraw that uses the W3C standard scalable vector graphics format (SVG). Some supported SVG features include basic shapes, paths, text, markers, clones, alpha blending, transforms, gradients, and grouping. In addition, Inkscape supports Creative Commons meta-data, node-editing, layers, complex path operations, text-on-path, and SVG XML editing. It also imports several formats like EPS, Postscript, JPEG, PNG, BMP, and TIFF and exports PNG as well as multiple vector-based formats.
Give it a go, you can build logo's, icons, all sorts of scalable graphics quickly and easily, and best of all it won't cost the school a penny; just a little time to learn the ropes.