The primary bilingual programme begins in year 1 of public primary school and runs throughout its full 6 years.
At least 30% of classes are taught in English (a minimum of 7.5 hours per week), corresponding to at least two subjects of the primary education curriculum, preferably Natural and Social Science. Although there is no set upper limit to how many subjects can be taught in English (other than a practical one set by the number of certified teachers), the subjects Mathematics and Spanish Language & Literature cannot be taught in English, and must be taught in Spanish.
Students also receive increased hours of English as a Foreign Language (EFL) (5h/week, one hour per day) compared to non-bilingual public schools. EFL must also be taught in English.