These cover most subject areas and include research level material. To limit to New Zealand material add zealand as a keyword.
There are lots of different types of articles. At university you'll often need to read peer reviewed or scholarly articles when doing research for your assignments.
AUT Library subscribes to Ulrichsweb, a database with very detailed information about journals and magazines, including whether they are peer reviewed.
The difference between articles from a scholarly journal, trade/professional magazine, popular magazine and newspaper article is explained in this short video.