AutoCAD Drawings created with an educational product will have a watermark on all 4 sides of the drawing. Blocks & Xrefs made from entities in the drawing will also have the watermark.
We recommend scanning the drawings and having them re-drawn in a professional version of AutoCAD. Don’t hire a consultant who produces CAD drawings with educational products if your drawings are for professional purposes. If you are a techie, you may want to experiment with these suggestions. We have not tried them…http://cben.net/educational%20version.htm