Stores are out of the question. You send your son next door to see if they have a sheet of paper. Thinking he got the message mixed up, they send him back with a cup of sugar. Decrease the margins. ClarisWorks word processing documents default 1 inch margins.
Different fonts are very different in size and spacing between letters.
Try another font, like say Times. Cut down the font size. Instead of 12pt, try 11pt. That isn't in the menu. Sure it is, choose Other and enter 11.