I just learned this trick and thought I'd share it. I had tons of light bulb moments in my class when I shared it with them! Hopefuly it makes sense on here. Good Guy (+) Comes to town (+) Good thing (+) Bad Guy (-) x Leaves town (-) = Bad thing (-) ____________ _______________ _______________ + x + = + - x + = - + x - = - - x - = + So...If a good guy comes to your town it's a good thing (+) If a bad guy comes to your town it's a bad thing (-) If a good guy leaves your town it's a bad thing (-) If a bad guy leaves your town it's a good thing (+) A little easier for my kids than just memorizing the rules. ETA. Well, this didn't work like I meant for it to. I couldn't get my +/- to line up under the columns. if you have questions about it just ask.