This is a speaking exercise to practise clauses and infinitive of purpose:
This role-play can be used with students who are studying about aliens (a common course-book topic), for the practice and revision of narrative tenses or as a lead in to writing newspaper stories.
This is a speaking exercise for the future perfect and future continuous forms for intermediate and upper-intermediate students.
This is a speaking exercise for pre-intermediate and intermediate level learners which provides them with an opportunity to review and practise the superlative form whilst personalising it.
When it comes to revision, this is an activity I've found time-effective and motivating. After my students have worked on three texts in the textbook and done various comprehension and grammar exercises I use this activity to revise.