The National Study of English Learners and Digital Learning Resources conducted by the U.S. Department of Education, Policy and Program Studies Service, on behalf of the Office of English Language Acquisition and the Office of Educational Technology provided the first national data on how educators across the country are using educational technology in instructing English learners. The study conducted surveys, case studies, and meetings with experts in the field, including educational technology publishers, researchers, and educators. The study's final report describes how districts and teachers identify and use technology in instructing English learners, as well as related supports and barriers. This toolkit builds awareness of the role technology can play for English learners and notes areas where technology developers can improve their offerings for English learners, based on needs suggested by the study. The toolkit provides guidance for educational technology developers in the following areas: (1) The needs of English learners and their educators; (2) Supports to consider including with your product that may be especially useful for English learners; (3) Ways to communicate about products with districts and educators of English learners to facilitate adoption of your products; and (4) The types of professional development and training activities that educators find most valuable. Five guiding principles for developers are detailed here, including what to do, and what to ask tips. They are: (1) Understanding what English learners and their educators need; (2) Designing by leveraging research and best practices; (3) Inclusion of support features for English learners; (4) Communicating with educators to increase product adoption to support the instruction of English learners; and (5) Offering instruction-focused professional development. [For the final report, "Supporting English Learners through Technology: What Districts and Teachers Say about Digital Learning Resources for English Learners. Volume I: Final Report," see ED600461. For the accompanying appendices to the Final Report, "Supporting English Learners through Technology: What Districts and Teachers Say about Digital Learning Resources for English Learners. Volume II: Technical Appendices," see ED600462. For "Using Educational Technology - 21st Century Supports for English Learners. Educator Toolkit," see ED591004.]