There should be an apostrophe after "students'" i.e. the books of the students
I couldn't report it because there didn't seem to be that facility offered.
Do you remember what the options were?
Since moving to the new site we've "temporarily" lost the ability to make custom reports, so we're going to have to make do with what we have. I'd be inclined to report things with the closest fit option, even if it doesn't properly convey what you want. Some form of report is better than none if it alerts the team to something being wrong with the sentence.
As far as solutions go, it's a bit of a blunt instrument, but there's not much else you can do.
OK. I will go back into the lesson and find it and see what I can do. Thank you.
Should be student's not students'. The apostrophe only comes after the S of the word is not plural and ends in s. Example: Travis. Travis's shoes and Travis' shoes are both accepted.