These years of your child's time at school are called key stage 1.
At the end of each key stage, each National Curriculum subject has a target: your child should have reached a particular level of skills, knowledge and understanding.
Why have targets and tests?
Of course, some children may not make as much progress as others and some have special educational needs.
As a parent or carer, you have a very important role to play in helping your child learn. Some parents are afraid of doing the wrong thing. (If you are unsure about how to help, you can always ask your child's teacher.) The most important things you can do are:
Ref: DirectGov : Parentscentre