This Markbook is designed for use with either Google Sheets or Excel. It has column for student names, term number, and marks. At the bottom there are a number of sheets that can be edited and customized to your needs. Additionally it has a built in formula to average all your marks for each assignment!
Included in the ZIP file are the open source document for use with Google Drive, as well as an excel version, and a PDF. So you can see how it is supposed to look.