Cayo Deaf Institute in San Ignacio http://www.cdi-belize.net/
Located in the Baking Pot region, near Cayo, Belize, in Central America, is an unusual ministry dedicated to teaching and training Deaf people. CDI provides a free education to Deaf children from all across Belize. Volunteer and staff teach all levels of classes to Deaf students. Many of the students arrive at CDI with no knowledge of Sign Language. Some are not aware that communication is even possible.
Another option, klcman's answer in post about schools for deaf in Belize.
Stella Maris School and The Belize Academy for the Deaf
Joy Westby (contact person)
Belize City, Belize
Description: Stella Maris is the largest special education center in Belize. It also manages the Belize Academy for the Deaf which is at the same location. There are 5 deaf classrooms for children who range in age from 5 to 17.
A Day at Stella Maris video http://www.youtube.com/watch?v=e5rKqdiYNwU