The local newspaper is a source of reference here, or your local library. Alternatively, most schools and colleges nowadays have evening or daytime courses that are open to adult learners. Many of them will have an advice point, so that you can telephone or drop in to discuss what you are looking for. Many will have an open-learning centre where self-assessment tests and open-learning materials are available.

Author(s): The Open University

• *The Good Study Guide, by Andrew Northedge published by The Open University, 1990, ISBN 0 7492 00448.

Chapter 4 is entitled â€“ â€˜Working with numbersâ€™.

Other chapters are â€˜Reading and note takingâ€™, â€˜Other ways of studyingâ€™, â€˜What is good writing?â€™, â€˜How to write essaysâ€™, â€˜Preparing for examinationsâ€™

• The Sciences Good Study Guide, by Andrew Northedge, Jeff Thomas, Andrew Lane, Alice Peasgo
Author(s): The Open University

Where to get more help with using and interpreting tables, graphs, percentages, and with other aspects of numerical work.

Author(s): The Open University

This glossary is intended to provide a basic explanation of how a number of common mathematical terms are used. Definitions can be very slippery and confusing, and at worst can replace one difficult term with a large number of other difficult terms. Therefore, where an easy definition is available it is provided here, where this has not been possible an example is used. If you require more detailed or complete definitions, you should refer to one of the very good mathematical dictionaries tha
Author(s): The Open University

We have now looked at a number of different graphs and charts, all of which were potentially misleading. We hope that from now on if you have to work with a graph or a chart, you will always consider the following points:

• look carefully at any horizontal or vertical scale that is given;

• consider each graph or chart separately, don't compare them unless you are sure that they have the same scales;

• if it is not easy to
Author(s): The Open University

The median is the middle value of a set of numbers arranged in ascending (or descending) order. If the set has an even number of values then the median is the mean of the two middle numbers. For example: