We are not talking about the universe

The original question is :

Should creationism be taught in schools ?

In other words :

Is a biology teacher allowed to claim that evolutionism is nothing else than a theory while creationism might be a possible alternative ?

The answer is : no

The scholastic programms must be decided by a scientific commitee and they must be the same for all the students, all over the country
Fundamentalists may be disppointed but the plain truth is that 99.999 % of the experts believe in the evolutionism thus evolutionims only must be taught in schools

Nobody prevent religious people from claiming that universe has been created by God in seven days provide they made well clear that it is just a matter of faith without any scientific evidence

This must be valid for government owned school but also for private schools, run by religious people

One again

Education is not a right
Education is a duty