Joyce Valenza I have discovered a way that you can print posters using a standard inkjet or laser printer.
Block Posters is a web-based tool to which you can upload a high quality graphic then divide it into letter-sized chunks for printing. Print out each section and put them together on a poster board to make your own poster.
Applications for Education
If you find a great infographic like this one about our solar system that you want to display in your classroom, Block Posters could be a great tool for you to use. Want to create a giant jigsaw puzzle? Block Posters could be useful for that. Or if you have students create their own infographics that they want to display, print them out with Block Posters. Speaking of creating infographics, click here and here to learn about a couple of tools for creating infographics.