This edition includes principles for seven strands: Program Structure, Curriculum, Instruction, Assessment and Accountability, Staff Quality and Professional Development, Family and Community, and Support and Resources. Each strand includes a review of relevant literature on research and best practices in dual language education and a series of guiding principles to support exemplary practice. NOTE: Click on the URL above and click on “Download the free digital version.” After providing your name and email address, you will receive the direct URL for the document.