Boolify

Nothing earthshattering, but an Boolify is interesting little site that might help some conceptualize the concept of boolean operators.

Librarians, teachers and parents have told us how hard it is for students to understand web searching. Boolify makes it easier to for students to understand their web search by illustrating the logic of their search, and by showing them how each change to their search instantly changes their results. ...Its primary audience is Elementary and Middle School children, but it may find relevance with others. Ultimately, its goal is to increase learners’ ability to perform effective web searches.

Might be cool to hack it (or ask them) to use it to search a basic library database...