You can add some nice color, bold letters, and other visual stuff to make an informal report.
You can make nice graphics. I like dispersion graphics. Sometime the linear approximation is useful, but perhaps it's too much for 9-12yo.
I was already pretty tech-savvy in those days but that was still one of the best things I learned as a kid computer-wise. The fundamental principles of a spreadsheet has never changed and I learned it as a 12 year old.
Schools here in Sweden uses word/google docs but not sheets for some reason.
I don't understand why you would force your children to depend on an unethical for-profit corporation. Why not LibreOffice? 99% of what normal people need is covered in it.
Also, at least when I went to school the software versions used were fairly old (partly because of the budget and partly because that is what the teachers originally developed their course for). Those were different enough (think pre-ribbon) to trip those people up who memorized instead of learning what things mean. I.e. "spreadsheets" skills transfer, "this is what the button looks like in office 95" does not.
Schools are for learning not for training for corporate.
??
I'm not saying it couldn't be done (and run on Linux of course) but the entire industry needs professional support tailoring the needed software package, solve problems, install updates or define the needed hardware all are (presumably easily) solvable with Microsoft or Google products, but don't have out of the box solutions for an entire country.
You can't rely on a school kid or teacher to install Linux distributions or download the right software.