A model is an example of the target language a teacher shows learners to help them notice language patterns, or to encourage them to imitate. This could be a sentence, a model of an intonation pattern, or an entire text, such as an example of a writing genre.
Learners are looking at different uses of the present perfect continuous. The teacher writes two models on the board, 'I've been waiting for you for ages', and 'What have you been doing? You look awful'.
In the classroom
Clear, accurate, contextualised models are an important part of language presentations as they show learners correct form and provide an example of use in context.