Replying to How to Pay Attention?

I sit through class every single day and i can't force myself to pay attention. I know if I could that my grades would be waaay better and im just sick of always lookin at the clock, fiddling with shit, etc. Does anyone have any ideas of what could help that are non-medicinal. I was thinking maybe finding something to play around with that doesnt require thinking to occupy myself with one thing so maybe i can direct my focus on class. Idk anyone have any ideas or tricks of your own?