Struggling with modules

Is it actually as simple as:

function myClass() {
    this.nextPresident = "Bozo the clown";
}
myClass.prototype.add = function(a,b) { return a+b; };
myClass.prototype.getNextPresident = function() { return this.nextPresident; };
exports myClass; // <------- Not valid JS?

You actually want exports = myClass?