I have lost count of the number of times DD10 has come home from school with pen/ink smudges on her hands - and needs to be specifically told to "go and wash hands, use warm water, soap and a nail brush if needed" as this does not seem to be something that she can take personal responsibility for, without constant reminders :(
Today, she came home from school with something written on her hand, and in response to my objections (I spotted it after she had been touching a new evening dress I had bought!), told me that her class teacher had told her to write it, so she didn't forget 
Is this common practice now? I remember getting a ruler across the knuckles from a teacher if I wrote on my hand!
To make it worse, the reminder she had written was to take the return slip back from her school report she brought home on Friday - which imo, is my responsibility to remember, not hers.