Laptops for Students

I teach U.S. History 8, World History 7, and CVTV which is a video editing class. All three of my classes use laptops on a daily basis. Unfortunately, the laptops we use are from 2011 and are either missing keys or take a very long time to boot up, or are just generally slow. I'm hoping to raise enough money to replace at least three of the laptops, maybe more!