I think that these skills differ from 20th century skills, because as science & technology become more advanced, we need to know these new skills in order to keep up with the world. Sure, people still need to master the skills from the 20th century, but they also need to know the "new" skills for those newer jobs that didn't exist in the past. For example, in the past, teachers used to teach students using those chalky blackboards, and old projectors. However, today's teachers are using technology ( i.e smartboards) to make their lessons more enjoyable and effective for students. But, right now, not all teachers are comfortable using those technologies. Therefore, knowing how to work a technology is actually considered a skill. According to one article, it says that " The public must acknowledge 21st century skills as essential to the education of today's learner."