Here you will find all of the content you will need to know for Integration. There is a guide based on the textbook reference from the Edexcel GCE AS and A Level Textbooks, but content is the same for most specifications.
Note: The examples and practice questions are given detailed solutions for pure understanding but in the real exam you have to focus on presenting your answer in a clear way so that the examiner knows your method and also in a concise way so you don't run out of time. The best way is referring to markschemes.