The Prime Minister said the programme, which was first introduced under new Labour, had been a huge success.
Writing in the Daily Telegraph, Mr Cameron said his Government would deliver "real social mobility" and promised to "not waste a second in getting on with the job".
He said the Government would recruit more academy sponsors and support head teachers in allowing thousands more schools to move away from council control.
But critics argue that by making all schools into academies, the system will buckle, leaving government responsible in the longer-term for failing schools.
"It's an interesting announcement, but to be honest it's not going to work. If you make all schools academies it's going to cause other problems as well," said Clive Ireson, Chief Executive, Association of Christian Teachers to Premier.
The academy programme has helped many struggling schools and it's a fine programme, but because it's disjointed with lots of people running academies there's nobody really having great oversight of it, except the government; and you can't run the whole of education from central government," added Mr Ireson.
Listen to Clive Ireson, Chief Executive, Association of Christian Teachers speaking to Premier's Des Busteed:
