Carol Vorderman has opened up for the first time about the struggles to teach her son, who was "deemed unteachable" when he was at school.It comes shortly after the former Countdown star celebrated her son Cameron's latest achievement - he had received a master's degree from Dundee University last week.MORE: Carol Vorderman's son Cameron takes over her Instagram to share emotional videoWATCH: Carol Vorderman's son gives emotional speech after academic achievementDuring a candid chat with the