English, who is right? (Sam)

We go to an all english speaking school which has every different country an english speaker could come from besides Ireland. Kayra- Aussie, Me - American, Ellie- Brit, Emi- South African. This makes english class very fun because at least once a day because we get into heated debates about how one should say certain things. The most recent one is whether Z should be called is zee or zed. Another great example was the argument between orEgano or or-e-gan-o.