My son has drawn a revision progress bar on the fridge so we stop asking him

Our 11 year old has mid-terms next week. My partner and I have, admittedly, been asking how revision is going roughly every time we pass his room. This evening he took the whiteboard off the fridge door, drew a long bar divided by subject, and coloured in the parts he has finished. Underneath he wrote: 'Updated at 7 pm daily. Please refer to the board.' I checked at 7:05. It had been updated. Maths is apparently 80 percent done. I was not invited to verify this.