Peer-Grading Tool is a plugin for Google Spreadsheets. It is intended for educational use cases where students should grade each other in a peer assessment process. The tool was kept simple and flexible to adapt fast when you need it. All you need are the Gmail Addresses (Google Users) of your students. Then *Peer-Grading Tool* creates a sheet for each student which is protected from other users. There students can rate work of their attendees (e.g. a presentation). You have several options for configuration of this process. This include: * Skills which are rated * Weighting of every Skill * Rating Points - Min and Max points students can use for Rating The tool will take care so that * Students can not edit other students ratings * Points range is followed * Students get detailed information about their performance