Dd2 hasn't been taught those methods, they have only covered dividing with a reminder of a whole number eg. 5 r2. She has just stared in y6, more worrying is that dd1 who has just started year 7 said she hasn't been taught the division method using fractions and decimals as the reminder either :/ Just re read your post & saw your DS was taught it in year 2; Dd3 has just started in year 3 but goes up to the year above her for maths & also hasn't been taught this. Am rather concerned.
Is this a particular quirk of your school, do you think, or an overall policy in the LEA? I would envisage even our poorer local secondaries having something to say about it if they found that none of the kids moving up to them had been taught anything more than very basic skills in division at primary school.