Here is the document that shows the expected standard for Year One children. This is where your child should be working at the end of Year One. We revisit these skills throughout the year building on prior knowledge to ensure the children are confident working with numbers.
To help your child further at home you can play counting games and talk to them about what makes a number a number, for example how many groups of 10 and ones in the number 34. What is one more and one fewer?