Here is a small selection of websites with games or worksheets to help you get ready for next year.
http://www.classmaths.com/ (links to Irish curriculum)
http://mathster.com/free_worksheets.php (free worksheets)
https://www.mathsisfun.com/links/index-curriculum.html (Year 3 & some of 4)
You will find games that cover all strands of the curriculum within these websites. Enjoy!