Was parents' evening last night.
All ds's (5) books were out for us to look at. We picked up his literacy book and read comment praising his use of "the coma".
I was happy to let the spelling go, but try as I might I could not see any "comas" in his work.
We then sat down and talk to the teacher who begins to tell us how good his written work is and that he knows just where to put the comma in "isn't". The penny drops - she means apostrophe.
Dh and I tried not to say anything at the time as she really is a good teacher, but it was really hard.