Distractions include items like a computer, a phone, and small items that you can play with. Distractions also include things that are around you, like a friend, an annoying classmate, or a window.
Physical removal is the best way to deal with a distraction. So, for example, if you know a classmate is distracting you. Try sitting somewhere else. Your teacher will understand and will probably be more than happy to help you move seats.