Business leaders are calling for workers who can solve problems and innovate solutions, but how can educators teach such abstract skills? After all, isn't every problem unique? Doesn't every solution differ? Yes. But the fundamental tools of problems solving are common to all situations, and they can be taught. The two most important mental tools are critical thinking and creative thinking. Critical thinking is convergent. It focuses intently on a topic, paying careful attention to logic and rules. Critical thinking breaks a subject into its parts and investigates how the parts relate to each other: categorizing, sequencing, comparing, ranking. It is in-the-box thinking. Creative thinking is divergent. It sees a topic as a whole and imagines it as an analogy for something else: envisioning, improvising, riffing, wondering. Creative thinking reaches out to explore possibilities and defies convention and rules. It is out-of-the-box thinking.