The purpose of this book is to increase awareness of the numerous seminars, short courses, field courses, workshops, and programs for teachers, students, naturalists, and independent scholars. These programs emphasize the natural sciences including general biology, botany, zoology, ecology, marine biology, ichthyology, microbiology, natural history, and geology. Many of these courses and programs take place during summer vacation and vary in length from several hours to several months. The book is divided into three sections: courses, programs, and expeditions in the United States; international courses, programs, and expeditions; and National Science Foundation Teacher Enhancement Program: U.S. Courses and Workshops. National and international courses, programs, and expeditions are organized by state and country and provide descriptions of curricula, credits, environment, facilities, and application policies. The National Science Foundation Teacher Enhancement Program courses and workshops are organized by state and include contact person information. (DDR)