DD's teacher called me in yesterday and showed me her work-book, she has been drawing people with willies and vaginas... her reason is that her friend told her too.... 
I said I would have a word with her (which I have done) but I am also in two minds about it...the teacher deemed it inappropriate and rude, but is she not just becoming aware? (She was 6 in Feb, her brother is 5 and they bath together)