Need to know what it's in reference to. There are several classification groups which have a Class A... you could be talking about cigarettes, driver licenses, or a number of other things for all we know.
class 1 mean is learner
It depends on what the mean of the class was in the first place!
They mean that you have class 1 plaque
A school class - clase A person has class - elegancia (elegance)
how u react with your peers in your class
the social class mean is a working class for example teacher's nurse etc.
This mean "Are you in The Spanish Class?" in English.
what class is it in could mean many things like the class of cats and the class of mammals and the class of a taiga
it mean the average
Aristocracy mean the high class. This means the higher wealth and more educated class of people.
The ruling class is the one with the power.
I don't understand what you mean by "class" but its a alkali-metal.