Of course gf has also worked with twins (and there is a book to show for it) but we would need additional information about what proportion of the 300 babies were multiples, to calculate more accurately how much time it would take her to catch up with A teacher Truth be told, our own children spend more of their weekly waking hours with their teachers than they do with us, the parents, in term time, anyway. Thinking about it, the combined wisdom of mumsnet or Edf probably does count for a fair bit, even the parents of one child have clocked up a fair few hours by the time the child starts school. Perhaps there should be some accreditation scheme with a log book system. Extra allowance given for each bout of an infectious disease, vomiting or infantile antisocial behaviour.