Bob Garton, head teacher at a school in Barking said teachers are "under pressure because of the number of pupils and the mobility in the school".
Speaking to Daybreak's Nick Dixon he said: "We're coping well but it is a difficult situation, we have to stagger our playtimes in the morning, and also at lunch time the children have to come in at different times so they can fit in the hall and the playgrounds."
He said the only way the Government can solve the problem of overcrowding in schools is to give more money to the local authorities to build new school buildings.
Schools Minister David Laws said he agrees with the Commons Public Accounts Committee (PAC)'s vies on ensuring there are enough school places for children.
"Margaret Hodge is right", he added, "but she has failed to pin the blame where it belongs - at the door of the last government of which she was a member." He said:
Her report correctly states that the department 'failed to adequately plan' for the rising population, but does not explain that the responsibility for this failure lies with the previous schools secretary, Ed Balls, who ignored the rising birth rates reported by the ONS.
The coalition is clearing up the mess left by Ed Balls and Labour when they were in government.
Schools Minister David Laws said the Coalition Government "is tackling this problem" for a lack of school places for primary school children.
Speaking to Daybreak he said: "It ought to have been obvious since 2004 when we started to see a huge increase in the birth rate in this country, that we need more primary school places.
Unfortunately the last Government for the period 2004 to 2010 took out over 200,000 places from the primary school system in this country."
He added: "This coalition government is now putting those places back in.
"By this September we'll have created almost 200,000 places in the primary school system and we're actually putting in £12.5 million over this decade to invest in new school places to provide up to half a million places in the country."
Commons Public Accounts Committee (PAC) chair Margaret Hodge said the Department for Education has "failed to identify in time the rising demand for school places." She added:
Growth in demand is concentrated in particular areas of the country. Without enough resources to provide new places, some authorities are forced to sacrifice facilities like music rooms or expand classes beyond the statutory 30 children per class.
The inability of local authorities to require academies and free schools to expand further constrains them.
The department does not understand the costs for local authorities in delivering places or the relative value for money of different approaches around the country.