It is normal to provide students with feedback every time they submit an assignment. Still, some students (sometimes) do not understand where they need to improve. To address this issue, I have been handing out mid-semester reports to all my students and the easiest way for them to understand it to stick a radar chart in it.
Yes, I know we can do it with a spreadsheet software, but I wanted something that would be generic enough that I can use in different classes without the need to copy formulas over or making new files.
The tool is not finished, but I believe it is stable enough for others to test/use it. If you are curious to see how your mid-term reports are generated, take a look at the link below:
To make things easier, there is a sample spreadsheet that might help. Also, for each line, the report should break the page (use the print-preview to see how it looks).