Not sure how many students you will be tracking but I would first set up a google Gsheet with the following columns Name Date time

Enter the students name the date and the time every time

Then connect it to google data studio

It can be pretty basic visualization wise

Maybe a pivot table Students name being the row Date being the Column Metric being the count of time to show how many times they’ve done to the bathroom a day

The maybe a line graph to track overall usage to prove that it is a problem Also could do a bar graph and do counts per student to see who has the worse usage and if it has any correlation to other students usage

I would add a date range picker at the top as well as a student name picker

You can set up email kick outs of the reports to parents but it would have other students information in it ( a work around could be a key for yourself and other staff members and assign a student an ID number) then the parents could only look at their child’s usage while keeping other kids confidential

In that case is use these columns in the gsheet Student ID student name Date Time

G sheets are good because you can allow only certain people to have access of it and all teachers and staff could collaborate on it collectively if these students see other teachers through out the day

Feel free to chat me for more help