That I've written a long and rambling note explaining why I erased something on his homework worksheet.
They're not allowed to erase mistakes. The work he'd done was one huge mistake. There was no space for him to correct his errors, and I thought I could show him where he'd gone wrong and give him a fighting chance of producing some worthwhile work. He's in juniors, btw, this isn't his GCSE coursework.
She's going to think I'm a nutter 