If you only invite 1 student, it says, "You have successfully invited 1 students." It should say, "1 student".
![screen shot 2013-08-12 at 1 08 52 pm](https://f.cloud.github.com/assets/118984/948896/0e7952ee-0372-11e3-8812-4fedd2e2fcd5.png)