Plan the goals of your teaching. For example, if you intend to help the students pass a test, this will shape your teaching. Having an overarching goal will keep your teaching focused. Divide your teaching into sub-goals, so each lesson has a specific aim.
Divide each lesson into three basic sections. The first part of the lesson should involve you explaining an idea or concept to the students; the second part should allow the students to practice in smaller groups or pairs; and the final section should be interactive classwork where the students reinforce what they know. For example, part one would involve explaining the past tense of verbs in English; the second part would involve them practicing this with one another; and the final part would involve translating a passage from present to past tense as a class. Each new idea should be introduced in this format.
Set aside time for presentations. For example, Monday could see three of the students give a presentation in English about a newspaper article or a book of their choice. The length of the presentation should depending on the level of the students. Have students ask questions of the presenters in English to help with comprehension.
Give the students English-language newspapers to read for homework. This can be tailored to their specific interests. If they are interested in soccer, give them an article about a soccer player. This will teach them formal written English and will keep them interested.
Organize for them to have an English-speaking pen pal. If you have a connection with an English-speaking school, have them write to your pupils. Your pupils can then learn to read and write English, and learn about life in English-speaking countries. Help them address specific concerns about their English.