Flubaroo Add-on for Google Sheets is a powerful tool for quickly grading multiple choice and short answer quizzes created with Google Forms. Flubaroo has been around for years and has a bunch of features that are often overlooked by teachers. One of those features is the option to have quizzes automatically scored and grades returned to students as soon as they complete a quiz. With the autograde feature enabled your students don't have to wait for you to run Flubaroo before they get their grades. In the video embedded below I demonstrate how to enable automatic grading in the Flubaroo Add-on for Google Sheets.
Read this article for an explanation of how using Flubaroo is different from using the quizzes feature in Google Forms.