A critical essay is often used to assess the value of writing on a particular topic. This should not necessarily be negative but should assess ideas in a thoughtful way. It should concentrate on language structure and promote particular points. A critical essay should not be solely opinionated but should consider the ideas of other authorities. This will give it more credibility in the eyes of the reader.
You should find your evidence before you start to write, ensuring that you have made a good evaluation of the information you are considering. The essay should be commenced by outlining how the essay is going to respond to the specific topic and the writings. The points stated should develop an argument which critically evaluates the writings, fully developing each point with evidence from the writing. The conclusion must be a summary of responses with a final closing point plus suggestions for further study on the topic.