I have a four years old kid I have taught him 1 to 10 spelling in one phase Then after completing I have taught him 1 to 20 spelling But now he is forgetting.how will I teach him

A. It’s actually very early for a child to remember all these spellings you just have to go a little slow and keep practising what you are teaching every day while you are moving ahead so slowly only the child is going to learn it will take some time but regular practice is only going to be good