My children (age 6, 8, 10) are 1/4 German. My dh's dad is German, they are in regular contact with their great granny who was born in 1923 and was in the Hitler Youth etc ....
Next term (Oct onwards) dd1 (10 ) has WW2 as her "topic" at school. Although I grew up not questioning the way it is taught in the UK, all of a sudden dh (talking about learning this in school with a German Dad, even though his dad was born in 1945 and has British nationality now) he found it hard to heat all about the Germans as "baddies".
We've brought our kids up talking about all sides of their identity - they had a lot of fun and also many thoughtful moments visiting some of the Normandy beaches 2 years ago. They know that their Opa (Great Grandpa who died 2 years ago) was in the Lufwaffe while my Grandpa was gunner in the RAF.
However, I am worried about it coming up in school. Should I let the school (and dd1 has a teacher I know well and trust implicitly) know our family background on this? I don't want (rather sensitive) dd1 coming home upset from what is being taught. She;s happily scottish (me), knows a good dela about Ireland (dh) but there is still the German part which we have not addressed (though we are thinking of a holiday there to introduce the kids to where their family are from) and I don't want her to get a "bad" impression of Germans from school.