www.elearneconomics.com/section/index
You need to get a password from your teacher to use this website. Particularly useful are the sections on Demand, Supply, and Market Equilibrium.
Exam papers: www.nzqa.govt.nz/ncea/assessment/search.do?query=Economics&view=exams&level=01
Marking schedules: www.nzqa.govt.nz/ncea/assessment/search.do?query=Economics&view=reports&level=01