Different essays are designed to do different things. Some essays are designed to find out what you’ve learned about a particular aspect of your course. Some are designed to find out what you’ve learned at a particular stage of your course. Others are designed to see how well you understand and can apply key concepts in your subject. Different varieties of essay will require different types of writing and sometimes a single essay will require more than one type of writing. Here’s a guide to some of the most common sorts of writing and ways of organizing essay material.