What is "crammers"

Usage examples of "crammers".

If your principle is right, why don't you turn out to-morrow morning with the keys of your cities on velvet cushions, your musicians playing, and your flags flying, and read addresses to the Crammers and Coaches on your bended knees, beseeching them to come out and govern you?

He was educated in Britain, Spain and the USA, attending over thirteen schools and then a series of crammers in London and Brighton.