Some good tablets for teenagers as of 2015 are the Apple iPad Mini, Samsung Galaxy Note, Lenova Think Pad 2, Amazon Kindle Fire and Google Nexus 7. These tablets run on various operating systems, and their prices vary.
The Apple iPad Mini is highly portable and has a wide selection of applications, including parental monitoring apps that allow parents to keep track of their teenage children online. The Samsung Galaxy Note is an android-based tablet. It has a 10.1-inch screen and comes with a stylus. The Lenovo Think Pad 2 runs on the Windows platform and comes with productivity apps such as Microsoft Office.
The Amazon Kindle Fire HDX runs on Amazon's proprietary operating system. It's great for teenagers who love to read as they can buy and download books from Amazon onto their tablets directly. The Google Nexus 7 is affordable and syncs across platforms.