esl base is your guide into the world of TEFL which has Everything you need to Teach English as a Foreign Language. Provides information, tips, and resources for English teachers. Here is a directory of teacher training courses, job postings, teaching materials, discussions ... Eslbase provides online resources, help and advice for English teachers. We have directories of English language schools and teacher training courses around the world, TEFL vacancies updated daily, country guides and teaching materials. Eslbase.com's traffic volume is 3,573 unique visitors per day and its 6,074 page views.