It has an extensive range of fact sheets and videos on the five different electoral systems. Very readable and simple. They have nifty features such as “Which voting system is right for me” which asks you questions on what you think is important, and how important, and then measures the systems against your preferences.
They also have a You Tube channel. One of the videos I have embedded below. They are all quite short, so worth viewing all five of them.
By coincidence I was at Waikato University yesterday, speaking to the NZ Law Students Association Conference on the referendum. I was on a panel with Margaret Wilson and Tim Macindoe. For those interested, I’ve embedded my presentation below. Note this is my presentation, not from the Electoral Commission.