Ever wanted to turn an A4 sized image into a huge poster? Blockposters.com lets you do just that! Take an image file - perhaps a PowerPoint slide saved as a JPEG - and upload it to the site. Then decide how big you want your poster to be in terms of A4 sheets - perhaps six sheets wide? Finally export your poster as a PDF file for printing. It comes out of the printer in cropped sheets that can be easily trimmed and glued together. The gallery on the website shows some striking examples of huge posters.
Tony Pickford is a tutor and writer on primary education.