Paperless Printer

http://www.rarefind.com/paperlessprinter/
This is a great little piece of software that enables you to print out from any program (that allows printing) to a jpg or bmp image file.

It's useful for producing images of things like printable worksheets and websites for use in presentations. It also prints to pdf and html as well as several other file formats making it easy to share documents and other material.

It's free to download and use for personal use although you'll need a (very reasonably priced) license to use it beyond home use (I'd suggest that you'd need one for school use).