Schools (Accra)

Hi, I am considering relocating to Ghana but would first like to find out more on quality of schools. I have 2 boys, aged 9 and 5 who are in school in South Africa. My eldest son has a few learning difficulties and so is currently in a remedial school. He does not necessary need a remedial school, but at least needs speach and OT assistance. Our company is opening a new branch in Ghana and so at the stage am not sure exactly where we would be located, most likely Tema or Takoradi. Any guidance or info would be appreciated.