Family with two children, looking for accommondation in Thessaloniki

Hello, we are incoming Erasmus students at Aristotle University and we are looking for apartments. We are two families with four children in the age 4 - 12 years and we need two furnished apartments since we are having short term lease. Since we are traveling with our children we need to find a good and safe neighborhood in an area where our children can go to school and also a kindergarten for the little 4 year old.