No, although it might help in some cases. A 21st century teacher can be 60 years old and teach in a historic building. Over the past decade, huge amounts of money have been spent upgrading American schools. Our nation is now in the process of connecting all schools to the Internet and making sure computer access is available to all. In addition, educators need a macro awareness of the changes that are now occurring and a realization that the rules and tools for business and education have changed.
Teacher training is a good place to start.
The competencies and skill sets that are currently being taught to prospective teachers are still valid. However, they now need to learn an additional set of competencies and skills in order to teach students to thrive in the 21st century. Non-verbal communication skills. Individual counseling techniques. The alleged uni-bomber was excellent in math, but something very important was missing.