Abstract
Activity of the optional classes for students of multiple major, which are introduced in 2008 for Gunma National College of Technology, is reported. One of these classes, "Basics for Metallurugy", is taken as an example. Lectures are made not only by faculty teachers but also by external teachers to make the scope of the students wider. Some practical exercises are done expecting practical understanding of the contents. Other trial invention, results of the lectures and so on are also noted.
