There were a lot of web sites for Boardmaker on Google, several of them good references, especially the recommended one here from the manufacturer. Search using the keyword BOARDMAKER, and take a look at the hits returned.
Web site of Boardmaker manufacturer:
Linked page for the device, lesson plans, articles and discussion forums:
Getting started, learning to use the software and how the symbols and technology can be used in the classroom, including a link for a free download of the software (a demo) that you can try out and experiment/play with:
This software uses symbols and an ...
Discussion of Boardmaker software for language-delayed children in the classroom, with reference site, including free demo download.