I am not using the Internet correctly

Hello everyone, I am a school student and currently, I am in the 12th standard. And my parents allowed me to browse the Internet to solve any of my difficulties regarding my school subjects. But I think that I am using it inappropriately and I am using it mostly for social media and to watch movies and all which is not a good thing for me and my parents. Because they have trust in me and somewhere I am breaking it. But now I am thinking to use it in a correct or effective way. Please suggest me some tips which will help me to focus on my work only.

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