Get better sleep, little to no sleep can cause you to fall asleep while doing a task so more sleep equals to better concentration. start a planner! plan all assignments and do them in a timely manner , also make sure to turn assignment/homework in on time or days earlier.
I would do the things in the morning before you do anything else like going on your phone,so you can’t say that you have better things to do when you haven’t seen anything on social media or if any of your friends have texted you then once you get them done you can do whatever you want for the rest of the day.
