Tutor for one child, 13 years old, Nea Kifisia

We are looking for a tutor that can prepare and assist our son that will be attending a Greek school as of this year (entering 3rd Grade). As he has been growing up in an english speaking environment he will need systematic support in the first months. This would normally include :
- a 3 week training as of 19th/20th of August (2-3 hours per day for 4/5 days per week, could also be during morning hours) ahead of the new academic year.
- weekly (4/5 times per week late afternoon/evening) homework help and tutoring from September - November/December.
Specific experience in school preparatory teaching will be considered a plus.