The mind map that we just made is about the relevance between the essential skills that is needed in 21st century and the theories or concepts that we have learned in this class. The main idea of this mind map is essential skill for 21st-century students. We are relating the necessary 21st-century skills with the theories namely constructivism, behaviorism, Humanism, connectivism, cognitivism, and scaffolded. We are connected the problem solving skill with conigtivism, constructivism, and scaffolding. We use those theories because it is relevant. Cognitivism in problem solving means that problem solving comes from inner mental action to create knowledge. Constructivism in problem solving means that student learn how to develop a solution with minimal intervention of his/her teacher. And scaffolding in problem solving is that the student is being helped and taught how to solve a problem by the MKO. We also use the other theories for certain skills that can be read in our mind map. Hope we can learn something new after making this Mind map.