Magic squares and golden rectangles, skeletons and footprints, quilt patterns and temari balls make math ideas come to life in Math Amazements. Thirty-five sets of activities, designed to foster active thinking, infuse excitement into some of math’s big ideas and provide stimulating projects and extra-credit assignments. Math Amazements covers: Factoring and geometric shapes Five regular solids Eratosthenes’s prime number sieve Optical illusions Symmetry and tessellations How different cultures invented different ways to do multiplication Knot theory, probability and topography Magic squares and golden rectangles Introductions to some of history’s great mathematicians, including Plato, Fibonacci, Moebius and Gauss