The Internet is a global network of billions of computers and other electronic devices. With the Internet, it's possible to access almost any information, communicate with anyone else in the world, and do much more.
Introduction to Internet safety
There's almost no limit to what you can do online. The Internet makes it possible to access information quickly, communicate around the world, and much more. Unfortunately, the Internet is also home to certain risks, such as malware, spam, and phishing. If you want to stay safe online, you'll need to understand these risks and learn how to avoid them.
This is a great introduction to Sketch Up that will take you through building several projects to learn the essentials of Sketch Up.