I gave my students a self-graded quiz on Wednesday using a Google Form. When the students completed the exam and submitted the form I immediately got their answers and grades on the form's spreadsheet. I was able to tell the students their grades as soon as they completed the test.
When all of the students completed the exam, I used the Summary of Responses to show the class how everyone did and we reviewed the questions that students did not do well on. I could easily see what percentage of students didn't know the answer to a question. To download a pdf of the Summary of Responses click here.
This all took place in the span of one 30 minute period! I was psyched! To be able to have the students take the quiz, get their grades and review the answers in the same period enabled the students to get immediate responses and helped me address the questions that students did not answer correctly.
As an educator I felt that my time was not taken up with the grading of tests. I was able to use the data from the test to address student's learning in a timely manner and help them better learn the material.