About Centers TutorialsEach Center on the site is organized around a theme, to help you find everything we offer in that area, in one place. Within each Center, the practice tests, skill builders, tutorials, eBooks, and other related resources are organized by subject matter into smaller sections called Categories. Click or tap a Category to explore. Once you're in a Center, you can explore the category you selected, or check out the other categories. You'll find some helpful links at the top of a center page. " Home" will bring you back to the site's main homepage from any other page. Use the " Centers" links to explore and jump to a different Center's categories. And under your name, you can access your personal My Center portfolio, which lists all your resources along with your progress and results. This only appears when you are logged in to your account. Finally, help is always just a click or tap away. Know exactly what you're looking for? There's a search box at the top of every Center page where you can search for resources throughout the entire site. Now, let's take a look at one of the Categories to see what it's all about. A Category's resources are organized into smaller groups- subcategories and topics- to help you quickly find what you need. A category's resources are found in its topics. You can filter these resources by type. Every listed resource on a topic page includes a brief description and a launch button that opens it. If you don't see the launch button, you must register or log in first. From the top navigation path, you also can jump to other topics within that subcategory or return to the center homepage. You can also quickly search for a specific resource using the search box. Many topic pages also have contextual guidance available, too. If you see the Learn More Guidance tab on a topic page, you can toggle between the available resources and guidance. In a topic's guidance, you'll find helpful information or tailored suggestions for how to get the most out of the resources available to you.