The purpose of this paper is to provide a wide range of examples of writing across the curriculum (WAC) activities in order to encourage teachers to use writing in their classes regularly as a way of stimulating critical thinking in their students and providing variety in their teaching methods. The paper is presented in three sections. The first section presents reasons why WAC is important to all classes, not just English classes. This section is designed to encourage new WAC users by highlighting and explaining the many benefits created by WAC. The second section gives detailed descriptions of 29 different writing assignments the author has developed which have been tested in a variety of courses. The assignments are organized into five categories: Motivational-General, Personal Reflection/Motivation, Content/Process, Content/Personal, and Content Enhancing. Each category is intended to solicit responses that will foster student motivation by having students look at personal issues facing them or through examination of content or procedures. Each writing assignment description is also divided into six sections. Section three provides a listing of approximately 70 World Wide Web sites that have interesting materials concerning WAC approaches with numerous links to colleges and universities. Contains 23 references. (RS)