José David is a teacher, programmer and youtuber that simplifies the use of google sheets for teachers. It gives an example of how to use it for grading scores in a classroom and also mentions many other ways of making use of this tool in a practical way.
Aula en la nube is a channel in youtube that provides a full course about google sheets in order to get a full understandment of this tool. It goes from basic operations to complex algorithm. The value of this playlist is that is completely free.
Soy docente is a youtube channel that helps teachers to use the ICT's for their professional practice. This video is the first part of 3 videos that allows teachers to create an excel for attendance in the classroom.
This youtube channel helps both students and teachers in the ICT's learning by providing courses for beginners. It contains many videos of the different uses of Microsoft Excel.
This video lasts almost 50 minutes but it teaches how to use the google sheets app properly by giving the most important information that helps understand how this tool works.