Over the last year I have been using a third-party add-on called Flubaroo to do autograding for quizzes.  In the last couple weeks Google made a wonderful update to Forms.  Now they have seamless tools to make quizzes that allow for quick grading, analytics and feedback options that just make sense.  I'm excited to use this for assessments and training tools going forward.  Below is a video tutorial on this new tool.