It's vital that the written, taught, and tested curriculum; assessment; and instruction be tailored to today's learner (avoiding a discussion of learning styles at this point) because today's learners learn differently than those in the past. Technology affords learners to network with others which opens up educational opportunities like no other time in history. Learners now have the world as their audience as opposed to only the teacher.
In terms of learning objectives, expressive over behavioral outcomes provide the potential for diversifying assessment and instruction in terms of content, process, and products. Giving learners a choice in their own learning shifts to a more learner-centered paradigm that considers teachers more as curators, way-finders, and facilitators. Finally, today's learner needs to know the what, how, when, where, why, and with whom of education in a way that focuses more on ontology (i.e., Who am I? What is my role in life? How do I impact my own personal learning network?) and not only epistemology. And yes, I think these same questions can honestly and productively be applied to youth of all ages in ways that promote creativity, criticality, and caring. This is one perspective on why it’s vital that the written, taught, and tested curriculum; assessment; and instruction be tailored to today's learner. Thanks for asking. :)