Secret pocket-guide with the most important collocations in the IELTS reading and listening tests. You can use this mini-guide whenever you want for some quick high-focus revision.

Modern developments in theoretical and applied science depend on knowledge of the properties of mathematical functions, from elementary trigonometric functions to the multitude of special functions. These functions appear whenever natural phenomena are studied, engineering problems are formulated, and numerical simulations are performed.

The Simple Past Tense (Form and use)

When do we need to use the past simple tense in English? Remember, this is the basic past tense. We use it whenever we want to talk about the past

English At Your Command! Student Handbook

In this book, you'll find all kinds of ways to communicate what you're thinking, feeling, and imagining. You can use this book to find out just what you want to know about words and writing. You'll learn how to organize your ideas and how English works. You can also learn how to do research -- not just in the library, but on the Internet, too! At the back, you'll find fascinating facts about life in the U.S.A. Whenever you have a question about English, you can look here first. This book will put English At Your command!

Help for Worried Kids: How Your Child Can Conquer Anxiety and Fear

If your son begs to stay home from school to avoid speaking in front of the class, should you be worried? If your daughter insists on crossing the street whenever she sees a dog, what should you do?