You don't have to say yes to and encourage EVERYthing. I've noticed this is/was a myth in some places more than others. In first grade I lived in Canada (rather than Europe), and I asked my teacher if I had spelled Jamayka correctly (I had not), and instead of telling me how to spell it he just said "good job" . Not an isolated thing, people would look at the 100th squiggle their child "painted" and go "great job that's soooo good!!!!" as if the child would suddenly lose all will to live if they offered some improvement ideas.