Abstract
Certain aspects of students' reflexive activity organization and their self-assessment in the Ukrainian language lessons at lyceum are revealed. Having analyzed the recent studies of Ukrainian linguistics scholars and publications of language teachers on the outlined problem, having studied vocabulary articles of lexicographic publications, it has been found out that self-assessment and reflection should be considered as two interdependent processes, since the implementation of the first is impossible without the implementation of the second. Emphasis is placed on the importance of organizing students' reflective activity in connection with motivation and self-evaluation. Reflection questions and selfassessment tasks that can be used during the Ukrainian language lesson are suggested

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