e learning a language - the more you practice and the more you use it, the better you become.</p>
<p>Additionally, a number of the chapters of this book have an associated video or videos. These videos are there to support you as you get comfortable in your data skills. However, it is important that you use them wisely. You should always try to work through each chapter of the book (or if you prefer each activity) on your own first, and only then watch the video if you get stuck, or for extra information.</