Although these modules do not contain everything you need to know about any of the subjects, I have tried to give as much explanation as possible of the key features built into them. I have also tried to take you step by step through any calculations they need to do. In addition to the learning objectives, there are always the objectives that a student needs to bear in mind. Here are a few ideas that should help you to answer this question. Firstly, these modules are a bonus that can help you out in a few ways.
Textbooks are fine, the television and radio are fine as additional resources.
Case studies and past examination questions are also fine and so is project work. They are new and contain aspects of the topics that you might find challenging and that can go over again and again. When you work through any of the calculations, the spreadsheet has been programmed to tell you whether your answer is right or wrong. If you are interested in spreadsheeting as well as accounting and economics, you will find examples here that will help you with your own work. Take a look at some of the formulae, functions and features of these spreadsheets and you might find a few things that you can use in your own work.