I like your approach and will go out and buy a steno pad to do the same thing. 

I would like to respond to your query for a digital approach.  Though I don't believe it tops your system, it could be used in line with your system.

 I have a number of students who are supposed to receive daily progress reports.  They bring the form to each class and have each teacher fill it out.  The problem is, some students forget the form.  One student would purposely leave the form in his locker so he could "relax." This parent needed the progress reports for the child's therapist and to help improve the students behavior both at home and at school.  I created a google form containing the same information.  I allow anyone with the link to complete the form and only give the link to the child's teachers.  I made a bookmark in my browser to the form so I could quickly click and fill.  I shared the link to the spreadsheet associated with the form with the student's parent and advised them to place a bookmark on their browser.  Every day teachers click the link, fill out the form and submit.  It takes less time than handwriting. Everyday, the parent can click the link on their browser and see the daily comments from the child's teachers. As needed the parent can print for other service providers or share the spreadsheet link.

The spreadsheet is the perfect "paper trail.