Are these introductory translations in Māori correct?
Kia ora koutou - Hi everyone
Ko Corey toku ingoa - My name is Corey
Kei runga ahau i te mahi ki te ako i te reo Māori - I'm on a mission to learn te reo Māori
Ko tenei wiki kotahi - This is week one
Kua hari ki te whakatau ia koe - Pleased to meet you all
Ka pai to rā - Have a great day
Hei kona rā - Goodbye

Question

Are these introductory translations in Māori correct?
Kia ora koutou - Hi everyone
Ko Corey toku ingoa - My name is Corey
Kei runga ahau i te mahi ki te ako i te reo Māori - I'm on a mission to learn te reo Māori	
Ko tenei wiki kotahi - This is week one
Kua hari ki te whakatau ia koe - Pleased to meet you all	
Ka pai to rā - Have a great day	
Hei kona rā - Goodbye

Answer

Kia Ora Corey!  I just recently joined italki as a te reo Māori teacher!  Are you still learning te reo?

Great job with your sentences!

Here are a few corrections:

- Remember the macrons on your kupu.  Missing macrons on tōku, tēnei, tō, konā
- I recommend saying "Kei runga ahau i te mīhana ki te ako i te reo Māori" - I'm on a mission to learn te reo Māori.  
- Missing "te" - Ko tēnei te wiki kotahi
- I recommend "Pai ki te tūtaki i a koe" to say "pleased to meet you".

If you have any questions, let me know! :)