My DC's school doesn't teach column addition AT ALL. Even in Y6 they want them to use a number line. Which DS1 refuses to do for anything above a 2-figure sum. HE researched (by himself!) online for an 'easier' way to add up 3-figure plus sums...and came back with column addition. That was in Y3. He's now in Y5 - in the top group of top set for maths - and they still haven't been taught long multiplication or long division?! I taught him at home about 18 months ago. I think some schools are so stuck on the 'number line' or partitioning method, that they forget to teach column sums.
DS1 now does 6-figure column addition / subtraction. And 4-figure multiplication. For fun. Strange boy.