This little book aims to clarify and give a synoptic description of both the notions of 'Metacognition' and 'Theory of Mind', as well as a short comparison of these two 'hot' scientific topics. After giving the theoretical framework of the concept of 'Metacognition', it describes a number of practical suggestions of how educators of all levels can enhance their students' metacognitive abilities in practice. Then it analyzes all the basic aspects of the concept of 'Theory of Mind' and its relation to Language. Finally, it tries to combine the two theoretical concepts, i.e. 'Metacognition' and 'Theory of Mind', by making some helpful clarifications and identifying their major similarities, differences and convergences. In this way, the author hopes strongly to contribute to the resume of the Literature Review in a concise and handy volume, and wishes to help all the interesting parts, scholars and teachers, to do their own insights and improvements (theoretical and practical) in these crucial areas.