U.S. Department of Education data show that English learners in grades K-12 in U.S. public schools in the 2015-16 school year numbered over five million students-- about 10 percent of all enrolled students--and that roughly three-fourths of public school districts included students who are English learners. Many teachers, including those in small and rural districts, have one or more English learners in their classrooms--or soon will--and these teachers often use technology when instructing their English learners. This toolkit is for all educators--including teachers and administrators--who want to use technology to help their English learners gain proficiency in English and meet academic goals. In choosing to use technology, educators should recognize the supports offered and the constraints of any technology in the context of their own students and their needs. The toolkit offers five guiding principles for educators to apply in exploring new ways of working with and supporting their English learners through technology, starting with recognizing their students' unique needs and thinking through to the best technologies to help meet those needs: (1) understand what educational technology offers for instructing English learners; (2) discover the types of educational technology available; (3) maximize the supports that educational technology offers English learners; (4) seek out hands-on, instruction-focused professional development; and (5) learn more about English learners and educational technology.