I hope that you have discovered the awesomeness of using the Add-On known as Flubaroo. Flubaroo allows you to automatically grade tests and quizzes with ease. I know that those of you who have been using Flubaroo, often use short answer and open-ended questions. Flubaroo has up to this point, had no way for you to grade these kinds of questions.
Now you can use Flubaroo to grade questions by hand. Check out this LINK for that latest Flubaroo update.