hey, im doing ocr gcse economics too. i just downloaded the specification from the ocr website and was seeing what u had to be able to know for the exam. but the most common questions will be "is inflation gd for the economy?", "evaluate the advantages and disadvantages of economic growth", "what would be the effects if the UK joined the euro", so just learn those and other pretty well and u'll do fine. for the case study paper u need to do a lot of research on the housing market...