Hi I'm a primary trainee teacher. I'm going to be teaching the children about the Romans. I need some advice please. When I introduce the key dates e.g. 43 A.D, I want to explain to the children what A.D means. I have no idea, I've looked on the Internet and this has confused me even more. Could somebody please help? Also, how could I explain it to the children in child friendly speak, they are year 4. Thanks in advance.