Even if you have a 21st Century classroom(flexible and adaptable); even if you are a 21st Century teacher ; (an adaptor, a communicator, a leader and a learner, a visionary and a model, a collaborator and risk taker) even if your curriculum reflects the new paradigm and you have the facilities and resources that could enable 21st century learning – you will only be a 21st century teacher if how you teach changes as well.
Your pedagogy must also change.