From addition to subtraction to plane and space geometry, graphing, simultaneous linear equations, and probability, this book explains middle-school math with problems that children can understand and "want" to solve. 20 line drawings. 20 tables....

The Art of Construction outlines the basic principles necessary to build bridges, skyscrapers, and other architectural structures. Projects that demonstrate how these principles keep the deigns from falling are given....

Between a nomad's tent and the Sears Tower lies a revolution in technology, materials, and structures. Here is a clear and enthusiastic introduction to building methods from ancient times to the present day. B/W line drawings....