Use the powerpoint to describe the task to your class. Students complete the corresponding worksheet. Then display the mark scheme on the powerpoint and students either self assess or peer asses their work using the markscheme. They can then use another coloured pen to show their improvements/ what they missed out. I have included two types of co-operative learning quizzes for your to use as revision prior to the activity. Rally quiz. Give each pair a card. They ask a question each - like a rally. Answers are included on the card. For fan and pick, students work in groups of 4. Student 1 fans the set of cards, student 2 selects a card and passes it to number 3 who reads the question. Student 4 answers. If it is wrong, 3 coaches. The students rotate responsibilities clockwise until all questions have been answered.