On these islands the education system is rather different to that of the United Kingdom. There are no full time International schools on the islands and children must attend a Greek school or alternatively be tutored at home.
Primary schools, Secondary schools and Colleges are all widely available but you must be able to speak Greek in order to further your education. The school hours on the islands are 08.15 - 14.00 with all schools closing for the rest of the afternoon.
It is recommended that relocation for those wishing to make a permanent move be sooner rather than later as the younger you are when you joining the Greek education system, the better the chance of you succeeding in your chosen subjects.
Following that if you wish to further your education, you may need to travel to one of the large cities in Greece to find a University; the main one being in Athens. However, one is at present being developed in Crete and is opening very soon indeed.