Flubaroo is another example of a great Google Script that can automate something in a Google Spreadsheet to make things easier for students and teachers.  Flubaroo can automatically grade a Google Form that is used as a quiz or formative assessment.  It will automatically grade multiple choice questions on a Google Form and allow the teacher to provide feedback and the results in an email that is sent out to each student.  It is simple to get started and can save a lot of time in providing feedback and giving the teacher a quick analysis of how well the students are understanding the concepts in the class.