The computer as microworld and microworld maker

This paper makes a case for the inclusion of Logo and Logo-based microworlds as part of an introductory course on educational computing for pre-service teachers. Logo is an interactive, exploratory, mathematical problem-solving environment as well as a flexible, powerful, easy-tolearn programming language. As such, it is ideal for illustrating three important ways in which computers can be used to enhance learning. First, Logo is a domain in which key ideas of elementary computer science can be readily introduced. Second, Turtle Geometry, the mathematical learning environment built into Logo, illustrates some of the ways in which computerbased microwodds can foster exploratory learning of important mathematical ideas. Third, Logo can be used by teachers as a programming language in which to develop exploratory learning activities connected to specific curriculum objectives. This paper offers a nine-hour sequence of Logo activities designed to introduce these ideas and encourage prospective teachers to learn more about Logo at a later date.