21st Century Reading. National Geographic Learning - ELT & PreK-12 Education. EnglishCentral. By Kieran Donaghy. Movie Segments for Warm-ups and Follow-ups. Movie Segments to Assess Grammar Goals. Free ESL Video Quizzes for Students. Free Quiz Builder for Teachers. English exercises: grammar, verbs, vocabulary, listening, worksheets - esl online. BBC Learning English - Learning English. TED Talks. Videos, articles, and tips to help you succeed, from the world's leading experts.