GCSE Bitesize has revision pages (that take you through the topic), a test and an activity – just scroll down to ‘Crude oil & fuels’ and ‘Useful substances from crude oil’. GCSE s-cool – Products from Crude Oil includes polymerisation – revision notes & animations, practise exam questions & a revision summary. Skoool Chemistry – click on ‘2. Oil Products’ for excellent lessons that take you through the topic (including alkanes & alkenes); also a glossary of key terms. Chemactive worksheets & answers just click on Oil questions. For Doc Brown’s Chemistry quizzes, word-fills, crosswords and study notes go here and just scroll down.