Two suggested work arounds.
The first way would be a bit clunky if you had lots of students, but you could enable binary files, and upload a 'starter' Excel spreadsheet.
Students would have to take turns to download the spreadsheet, add their dadta, and re-upload.
At least the wiki organises things with date and time stamps so that the latest version could be downloaded and editted.
Another alternative would be to have a table in your wiki with the format you have in the spreadsheet and have all the students enter the data.
When all the data has been enetered you upload the spreadsheet with the formulas and they copy and paste the data from the wiki into it.