The 1999 National Household Education Survey (NHES) was a random-digit-dialed telephone survey of the civilian, noninstitutionalized population of the 50 states and District of Columbia. Respondents were asked about their participation in the following six types of adult education (AE): (1) English as a second language; (2) adult basic education, General Educational Development preparation classes, and adult high school programs; (3) formal postsecondary programs leading to a college degree, postsecondary vocational-technical diploma, or other educational certificate related to job qualifications; (4) formal apprenticeship programs; (5) other work-related courses, including work-related courses and courses for a license or certification for a job; and (6) personal development courses (for example, sport lessons, Bible study, and courses related to health or hobbies). Data from the NHES were analyzed to identify trends in participation in AE and the extent to which participation is related to educational attainment. Overall, the analysis corroborated findings from previous studies showing that, when an overall measure of participation is used, higher levels of participation are associated with higher levels of educational attainment. However, when participation was broken out into the six component types of AE, the relationship between highest level of education and participation in AE disappeared. (Contains 18 references.) (MN)