Book excerpt: This guide shows adult educators how to use informal assessments to improve the learning of those they serve. It explains well-established assessment principles and demonstrates how educators can use those principles to devise and conduct assessments in collaboration with their learners. Care is taken to illustrate how the techniques of informal assessment can be implemented across the full range of adult learning settings. Consideration is also given to several current issues and trends in assessing adult learning including multiculturalism, distance learning, learners with disabilities, and using performance/portfolio assessments.