boolean logic

I have a need for better understanding of Boolean logic. I know enough to kind of understand it but not be a very good teacher of it. I watched a librarian use kids ages and sexes to demonstrate. I would like to know of anyone has any good lessons. I could 'google' it and use logic to narrow my search, but as usual, I'm low on time! Let me know if you have any ideas. I know we're mostly frantically trying to get our blogs in for points, but I'd like some good info.