Use the cooperative learning strategy ‘jigsaw’ where pupils learn one thing + then teach it to their group. I found that the laws on 'alternative 4th law&' are best left til after 1st 4 are learnt. ifaketext.com produced the phone screens. The code breaker + indices ppt were found on TES, but I can&';t find them again; thanks whoever you are! The tarsia was Mr Barton's, I changed it to have 6 mistakes so that pupils can be given soln sheet + circle them. Task 4 –teams given flipchart paper to write the answer in the middle + then writecorresponding questions , teams then rotate ie peer assess.