Flubaroo is a highly useful script that is great for formative, as well as summative, assessment. By installing the script into your Google Docs, you can have the option of grading responses entered in Google Forms as well as emailing the result and grade to your learners. It makes the whole process of marking responses in Google Forms very straightforward and this script is much-praised on the Apps Educator forum. Well worth the 3 minutes it takes to watch the video or if you prefer to read through the intro click here.
Convinced? Click here for instructions.