My 5 year old brought home a reading book about "man on the moon". It talked about the 12 MEN (not people, men) who have walked on the moon. I could let that one go as it was talking about past events and they were all men.
However at the end of the book it says something along the lines of "maybe men will walk on the moon again" - IABU to think that they should have used non-gender words (such as "people") or worded it differently? I felt the need to explain to my 5 year old that in the 1960-70s most astronauts were men and of course these days women were equally likely to walk on the moon/go into space.
Maybe I'm just easily wound up but this just seems like subtle sexism and there should be no place for it in schools.