You have to be very careful here - the classes are very large - if it was my child I would send him/her to boarding school in the UK,and fly the kid over for the holidays-I presume that you are coming to work here because that can be the only possible reason for living in/near Belize City-one of my friends,who is English(Spurs supporter),commutes from AC to the city.
Does your work contract not look after the childs education?
However St.Johns,college in Bz. is the best and you pay (possibly 6500 usd per yr) to go there-it is popular therefore you have to contact the headmaster,and I presume you will have both have to be interviewed