About 70 secondary school students were moved by the government along with their teachers four weeks ago after months of volcanic activity and heavy ashfall on Ambae.
The deputy principal of Ambae's Navutiriki Secondary School, Issac Tanga, said many of the classes being held on Maewo were in tents which sometimes leaked.
The school was also struggling to supply food and water to students, Mr Tanga said.
The teachers were asking the Education Ministry to return them and the students to Ambae where the volcano appears to have settled down, he said.
