InhaltsangabePrelude: Assessment for the 21st Century.- Human Action and Social Groups as the Natural Home of Assessment: Thoughts on 21st Century Learning and Assessment.- Growing Learning and Assessment in the 21st Century.- Aiming at Learning: Assessment as the Critical Link.- Sharpening the Aim: Making Strides to Create an Assessment Culture in Schools.- Using Evidence Centered Design to Think About Assessments.- Thinking About Assessments in a Transitional Time.- Participatory Assessment of 21st Century Proficiencies.- Making Assessment Relevant to Students, Teachers, and Schools.- Automated Essay Scoring in a High Stakes Testing Environment.- Assessing Change in Learners' Causal Understanding Using Sequential Analysis and Causal Maps.- Development and Use of a Tool for Evaluating Teacher Effectiveness in Grades K-12.- Epilogue: Achieving Quality 21st Century Assessment.