Thanks to advanced technology, smartphones are getting smaller, faster and stronger. And with superior functions, nowadays it has become one of the indispensable personal devices in students’ study. In particular, teenagers can benefit from this useful tool a lot. Firstly, it is portable, so they can take it with them. Secondly, it is very versatile, as it can be used for many educational purposes. For instance, students can take an online course and interact directly with their teacher. They can also research topics on the Web. There are tons of online resources in all fields, which help learners widen their knowledge. As a result, school students are likely to study far more independently and productively. In conclusion, it is a wise choice for each student to own a smartphone because it is an essential tool which brings a lot of benefits to their education.