Digital devices play an essential part in teenagers' lives nowadays. I strongly believe that parents should not strictly limit their children's screen time for the following reasons. First of all, they can be used for both research and study purpose. Students can access Internet to download data and store information and textbooks, which save amounts of money for paper books and time. This also means their backpacks are lighter but contain bigger data.

In addition, modern technology tools improve their study results because of a wide variety of useful learning applications on smartphones, laptop, tablets and other media players such as dictionary, spelling, translation, pronunciation and other apps. These apps are not boring but exciting them with colorful designed-courses, funny pmethods and attractive contents. Furthermore, students can study any time, anywhere as long as their devices are connected to Internet.

In conclusion, personal electronic devices bring more benefits than harm to students. I suggest that teachers allow and encourage the use of these devices in learning both inside and outside of class.