Washington state faces a growing teacher shortage, especially in bilingual education, math, science, English language development, and special education. And its teacher workforce is much less diverse than the student population. To reduce these challenges, state education leaders want to encourage limited certificated teachers to become fully certificated. This study examines limited certificated teachers' interest in becoming fully certificated, the barriers they face to doing so, and the supports they report needing in order to pursue full certification. The study is based on responses to an online survey administered in 2017 by the State of Washington Professional Educator Standards Board to the state's 1,834 limited certificated teachers. [For the full report, see ED600822; for the appendixes, see ED600823; and for the study brief, see ED600824.]