But the initiative is worrying many teachers, who are uncertain about their future if they fail to achieve grades in tests such as Ielts and Toefl."All teachers in primary school feel very nervous," said Nguyen Thi La, 29, an English teacher at Kim Dong Primary School in Hanoi."It's difficult for teachers to pass this exam, especially those in rural provinces. B2 is a high score.""All we know is that if we pass we are OK. If we don't we can still continue teaching, then take another test, then if we fail that, we don't know."