We also learned some things about making and printing the labels. If your printer ink isn't waterproof, you definitely don't want to use glue to attach the labels or take the poster out in wet weather. We had to bump up the font size to make it possible to read the labels from a distance. It helped to change the font from the default setting in the program we used (Arial is good) and put the text in bold.
After the project was completed we made up a sample poster to show what labels might be good for a poster and where they should be placed. If your school or science fair requires a different format, please post a description of it in response to this blog entry so other readers can get additional ideas for way to prepare their posters.