The number being divided. Example: When 37 is divided by 5, we call 37 the dividend. 

The number we are dividing by, which can represent the size of the groups or the number of groups.  Example: When 37 is divided by 5, we call 5 the divisor. 

The result of dividing one number by another.

The amount left over when we divide a number. The amount is not enough to put into equal groups or to make a new group.