I think that 21st century skills differ little from 20th century skills. In a way, they are sort of evolved versions of 20th century skills. In one article, it stated that at one point basic math, basic reading and writing were deemed appropriate, and that no more was required. Now, we learn more advanced math, and to read and write critically. Also, many of these "21st century skills" are skills that were known to be necessary since a long time ago. For example, professionalism isn't a new skill. Obviously you need to maintain a level of professionalism to impress employers and get a job. Critical thinking, problem solving, leadership, and creativity are just a few more examples of skills that aren't new and shouldn't be marketed as such. The only relevant 21st century skills are those relating to new technology, such as being computer savvy and knowing how to use tools on the internet.

Thanks Jeffrey... :D