Over a series of lessons you will be revising the chemistry topics you have covered so far this year by practicing past paper questions. This is key to maximising your revision. There are links for each of the lessons with the past paper questions and mark schemes. Feel free to spend more time on one topic than another if you feel you are weaker in certain areas. Work through them each lesson and you will find it will contribute to improving your grades. You can use the online textbook to help support you if you are stuck.