How to concentrate better on an airplane. please help?

this weekend i'm flying to new york for my cousins bar mitzvah, and i have to do a lot of work for school and i figure i'll try to do a lot of it on the plane. i have to study a case for my mock trial tryout and write an ysis about it, i have to read a book on coco chanel for english (aha we had to pick someone to read and do an essay on that was born before the 1900's) and i'm sure i'll have more homework. it's not that hard the work part, but i always have trouble concentrating on airplanes. how can i focus better any tips? p.s. i'm a freshman in high school.