Encara no tenim significats per a "prefabricate classrooms".
1Mr Williams said very few of the prefabricated classrooms were new buildings and many were 30 years old.
2He said the prefabricated classrooms were "modern learning environments" - a new style of open-plan classroom.
3Newtown students have been in prefabricated classrooms since its main block was demolished due to earthquake risk in 2011.
4Two prefabricated classrooms have been burned and 63 windows broken at St Joseph's Presentation College, in Lucan, Co Dublin.
5Since then the school has grown to 389 pupils who are catered for in the original building and prefabricated classrooms.