Contents: Preface. Part I: Theory Construction. D.E. Mithaug, D.K. Mithaug, M. Agran, J.E. Martin, M.L. Wehmeyer, Understanding the Engagement Problem. D.E. Mithaug, D.K. Mithaug, M. Agran, J.E. Martin, M.L. Wehmeyer, How Engagement Affects Adjustment. D.E. Mithaug, D.K. Mithaug, M. Agran, J.E. Martin, M.L. Wehmeyer, How Adjustment Maximizes Learning. Part II: Prediction Verification. D.E. Mithaug, P.L. Campeau, J.M. Wolman, Assessing Self-Determination Prospects Among Students With and Without Disabilities. S. Powell, D.E. Mithaug, Assessing Prospects for Self-Determination Among College Graduates With and Without Disabilities. A.S. Kebbeh, D.E. Mithaug, Assessing Self-Determination Prospects of Students With and Without Disabilities in The Gambia, West Africa. S. Lipkowitz, D.E. Mithaug, Assessing Self-Determination Prospects of Students With Different Sensory Impairments. D.E. Mithaug, D.K. Mithaug, Assessing Adjustment Gains by Students in General and Special Education. Part III: Prescription Verification. D.K. Mithaug, D.E. Mithaug, The Effects of Choice Opportunities and Self-Regulation Training on the Self-Engagement and Learning of Young Children With Disabilities. M.L. Wehmeyer, M. Agran, S.B. Palmer, J.E. Martin, D.E. Mithaug, The Effects of Problem-Solving Instruction on the Self-Determined Learning of Secondary Students With Disabilities. M.A. Columbus, D.E. Mithaug, The Effects of Self-Regulated Problem Solving Instruction on the Self-Determination of Secondary Students With Disabilities. J.E. Martin, D.E. Mithaug, J.V. Husch, E.S. Frazier, L.H. Marshall, The Effects of Optimal Opportunities and Adjustments on Job Choices of Adults With Severe Disabilities. D.K. Mithaug, D.E. Mithaug, The Effects of Choice Opportunities on the Engagement of Prospective Teachers in Student-Determined Learning. Part IV: Theory Evaluation. D.E. Mithaug, D.K. Mithaug, M. Agran, J.E. Martin, M.L. Wehmeyer, The Credibility and Worth of Self-Determined Learning Theory.