I developed a true appreciation for this product when I helped my 7 year old son with a school project this weekend. Ghostline posterboard is just like traditional posterboard in ever way except it had lines already drawn on it to make projects fast and easy.
I purchased ours in a pack of 3 but I think many stores sell them as single sheets as well. They run a bit more money than plain white posterboard but if you what a project that is neat and clean and don't want to spend loads of time measuring and drawing out lines, this is well worth the extra cost. The sheets are 22 X 28 inches and come lightly lined with a 1/2 inch grid pattern that is already printed on the paper. Once you have done the project drawn out or printed on the paper, those lines fade into the project and are hardly noticeable so there is no need to erase them. My son writes on a terrible angle and I would have had to draw pencil lines all over the place to get him to write in a straight line. This paper already had them so all we had to do was count over squares and draw away. The result was a neat and tidy project without all the pencil lines and eraser marks.
If you are looking for a quality piece of posterboard that will save you time and give you great results, try Ghostline.