Ok I'm really interested in Monterssori for my unborn child. So perhaps the graduates here can help me out a bit. Why is it a frozen curriculum? I appreciate Mo

Ok I'm really interested in Monterssori for my unborn child. So perhaps the graduates here can help me out a bit. Why is it a frozen curriculum? I appreciate Montessori made great improvements in teaching retarded children but surely any methodology advances? I guess you could say if it works why change it, but I'm suspicious of what seems like dogma.