DD Y4 is in a mixed Y4/Y5 her teacher told me if she was ever was struggling with her maths homework to let her know as she was going to give her the Y5. I didn't question it and thought great she loves maths and will enjoy the chanllege.
Now I've been thinking will that mean she will also be doing Y5 maths in class and if so what happens when she is Y5 next year in the same class.