Failing to teach evolution by natural selection in science lessons could lead to new free schools losing their funding under government changes.
The new rules state that from 2013, all free schools in England must teach evolution as a "comprehensive and coherent scientific theory".
The move follows scientists' concerns that free schools run by creationists might avoid teaching evolution.
Sir Paul Nurse, president of the Royal Society, said he was "delighted".
Sir Paul told BBC News the previous rules on free schools and the teaching of evolution versus creationism had been "not tight enough".
He said that although the previous rules had confined creationism to religious education lessons, "the Royal Society identified a potential issue that schools could have avoided teaching evolution by natural selection in science lessons or dealt with it in a such a perfunctory way, that the main experience for students was the creationist myth".
So far 79 free schools have opened in England with 118 more due to open in 2013 and beyond. They are funded directly by central government but unlike other state-funded schools are run by groups of parents, teachers, charities and religious groups and do not have to abide by the national curriculum.
The new rules mean if a free school is found to be acting in breach of its funding agreement - for example, teaching creationism as a scientific fact or not teaching evolution - the Department for Education will take "swift action which could result in the termination of that funding agreement"
Right now in several states all over this country there are charter schools, which accept state funding in the form of school vouchers (Most famously Louisiana), and which teach only a perfunctory version of evolution, or no evolution at all, in favor of stressing the completely non-scientific Creationist myth.
Personally I believe that there should NEVER be a time when a religious based curriculum is introduced into a science classroom, however if that is not possible due the vast number of idiots in our country, than at least I would like to see a law passed similar to this one in England, which insists that a comprehensive approach to evolution be taught to children, or risk losing their federal funding.
After all they are in school for education, not indoctrination.