Former British troops will be able to become teachers in England in just two years, under a new government scheme.
The Troops to Teachers scheme will offer fast track training for "highly skilled" ex-servicemen and women.
Education Minister David Laws said "Many members of our inspiring armed forces possess the skills and expertise relevant and transferable to the classroom."
But teaching unions have questioned if two years' training is enough.
People who want to become teachers usually need a university degree - but this won't be the case with this scheme.
Brian Lightman, from the Association of School and College Leaders, said: "There is no doubt that some ex-military personnel have the potential to make excellent teachers, but they need the right preparation and support."