[originaltext] A "national crisis" in teacher numbers is coming, six unions

A "national crisis" in teacher numbers is coming, six unions representing teachers and school leaders in England and Wales have warned.
    Government limits to teachers’ pay and "real terms cuts" to school budgets risk weakening standards, they warn. The joint statement warns that further pressure will be placed on teacher employment and ownership. This means more children will be taught by teachers who are not specialist in the subjects they teach, it adds.
    "The government must fully fund the necessary pay increases for teachers and school leaders in both England and Wales," said Mary Bousted, general secretary of the Association of Teachers and Lecturers, and she claimed 160,000 more teachers would be needed over three years to cope with a rapid increase in pupil numbers. She also urged the government to reconsider its pay policies "for the sake of our children and young people and the education system as a whole".
3 What does "national crisis" refer to in the news report?
4 What did Mary Bousted urge the government to do?