Why the parent needs a summary, not a transcript
The parent was not in the room for any of it. They paid for a block of lessons, dropped a child at the door each week, and picked the same child up looking roughly the same. The summary is how a month of lessons becomes visible.
A parent does not want a transcript of every lesson. They want a short, warm note every few weeks that tells them two things. What you have been working on and how it has been going. What is next. If you write to those two points, the message almost writes itself.
The summary is not a report card and it is not a per lesson play by play. It is closer to a postcard from a stretch of weeks. Specific, kind, easy to read between meetings, easy to forward to the other parent or the grandparent who is also paying attention.