To avoid misunderstanding the learners have to differentiate between English sounds. That is why activities to practice sound pronunciation, word stress and intonation are crucial for the learning process.
A teacher, who would like to organize a great lesson involving all students, has to take into consideration that everyone learns in different way. Howard Gardner lists eight types of intelligence which have direct influence on people's learning style.
Before presenting new grammar material, a teacher should decide which structure or its part will be taught. It should be introduced with the use of well-known vocabulary, because the grammar rule should be the only difficulty.
New vocabulary should be presented in a well-known context. A new word has to be the only difficulty. The teacher can also show a picture, a gesture or an object that help students to understand the meaning of a new item.