Mathematical Thinking To what extent are mathematical ideas common to all human cultures? We will examine examples from traditions around the world and find fascinating evidence of mathematical thinking in the varied ways people have mapped the physical world, kept records, structured their art and crafts, understood their family relations, and created games to challenge their minds. We will introduce modern mathematical concepts to study those examples of mathematical thinking in detail. At first glance, though, some people can be unwilling to agree that these products of other cultures lie within the boundaries of what our culture has defined as mathematics. Why have we created that border? Can or should we try to transcend it? Thinking About Mathematics In a 2005 poll, almost 40% of the adults surveyed said they actively hated mathematics in school, more than any other subject. Yet at the same time, almost 25% said they liked mathematics best, often because they liked its unambiguous, ''right or wrong'' nature. A few people even devote their lives to studying the subject, but many of them would disagree strongly about why it is appealing. What is it about mathematics that creates such divergent reactions? We will look at where the mathematics you have learned came from and how the historical development of arithmetic, geometry, and algebra has influenced the ways those subjects are taught. We will also consider the lives and testimonies of a number of mathematicians to try and cross the border and understand what mathematics meant to them.