I struggle(only when typing these days) with there,they're and their.have done since primary school.Was put on a special course when i was 9,but slipped back into it when i stopped writing regularly .Teachers reckoned it was a mild form of word blindness.In days of YORE we knew the difference between Your & You're. It all went to pot once they stopped using chalk & slates in favour of pencil & paper. Progress PAH!