All your child really needs to be able to do before they start primary school is:
-Take off coat and hang up coat on their own
-Undress and redress on their own including shoes
-Be toilet trained and be able to wipe their own bum by themselves
-Be able to focus and sit for at least 10 minutes
-Be able to open lunchbox and any pots ect inside and feed themselves independently
That's it if you send your child to school being able to do these things they will thrive there is no need for your child to be able to read, write, spell, count before they go to school as many schools use different methods to teach this and sometimes have to spend way too much time reteaching children who have learned it in a different way and i know hundreds of teachers who would be over the moon if all children starting reception could do all these things
So there is no need to be competitive and say well my child can divide 56 by the square root of pi or to say well my child was so advanced we had to teach him how to read so he would not get bored its just not needed they need to learn how to play independently or they will fail in school as being able to do things independently is important learning to read, write, spell all before 5 is NOT