Websites like The Learning Edge offer materials suitable for adults who are beginning English learners. There is a vocational focus to most of the materials, which should allow both immediate application for tomorrow’s lesson and clear models for designing similar materials for the specific jobs your students hold.
Even elite and expensive universities, such as MIT, have free resources for teachers and learners. MIT’s OPENCOURSEWARE shows syllabuses, lessons, and even videos from phonology classes in their Academic English Program. (The pertinent classes from MIT are listed as 21F.213 – 21F.233 on the home page link above.) After you stock up on resources for your classroom, you could decide to study anything from astronomy to zoology on your own using this resource. Now no village is too remote to take advantage of a top quality education, as long as the student (or teacher!) has at least intermittent internet access.