The teacher has a vital role to play in this cognitive and affective development. He must be aware of and respond to pupils' individual needs, abilities and interests. Language is structured. The key to mastering a language is understanding its structure. Therefore the pupils must be exposed to the structure of language.
Language is an important tool.
Like all tools it can be misused. The teaching of English must involve an appreciation of th behaviour expected in writing, reading, speaking and listening. Pupils should know that bad language is not acceptable in Islam. They should be encouraged to tell the truth at all times, never to speak ill of people and to show respect to the person they are addressing or being addressed by. They should be taught about approriateness of language and the importance and merit of keeping quiet when this is required.