It depends on the school and the nationality of the teacher, from what I've seen so far there's a big difference from school to school and also your experience. I've seen Egyptian and other Arab teachers get around 12000 to 13000 plus benefits. Western teachers can make more. Private and International schools pay better (depending on your nationality).
In Asian Schools like MES,Pakistani Schools ,Bangladeshi or Philpine schools it ll b less then 4000 QR per month