Since 1991, the Center for Applied Linguistics has monitored the growth of two-way immersion (TWI) programs in the United States. This information is published online in the Directory of Two-Way Immersion Programs in the United States (2000), accessible at http://www.cal.org/twi/directory. Programs listed in the Directory conform to this general definition of TWI through adherence to the following criteria: (1) language-minority and language-majority students are integrated for at least 50% of the day at all grade levels; (2) content and literacy instruction in both languages are provided to all students; and (3) language-minority and language-majority students are balanced, with each group making up one-third to two-thirds of the total student population. The information in the Directory is self-reported; it is based on responses to a questionnaire completed by representatives of the programs listed. A new feature of the directory is a search function that makes it possible to identify programs that share characteristics, such as location, student demographics, and program design. This digest summarizes findings from data in the directory regarding features of TWI programs, students, and staff. National data are presented, along with similar data from the three states with the most programs--California (86), Texas (34), and New York (20). (JSS)