Here are some helpful websites for parents
NCCA – National Council for Curriculum and Assessment
Parents page: http://www.ncca.ie/en/Curriculum_and_Assessment/Parents/
Here you can download a really helpful booklet to find out what is covered in the curriculum.
The website also offers some examples on how teachers teach different topics, like this tip sheet on Division
The NCCA have some super videos showing parents helping their children with maths. Although the videos are for children in first and second class they give some fantastic ideas and suggestions on how you can help your child and are well worth a look.
Help My Kid Learn
This website gives ideas to help your children learn everyday!